139961906154 has 192 divisors, whose sum is σ = 369398764800. Its totient is φ = 38478198528.

The previous prime is 139961906129. The next prime is 139961906171. The reversal of 139961906154 is 451609169931.

It is a happy number.

139961906154 is a `hidden beast` number, since 1 + 3 + 9 + 9 + 6 + 19 + 0 + 615 + 4 = 666.

It is a super-2 number, since 2×139961906154² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 139961906154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 126204952 + ... + 126206060.

It is an arithmetic number, because the mean of its divisors is an integer number (1923951900).

Almost surely, 2^139961906154 is an apocalyptic number.

139961906154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139961906154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184699382400).

139961906154 is an abundant number, since it is smaller than the sum of its proper divisors (229436858646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139961906154 is a wasteful number, since it uses less digits than its factorization.

139961906154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582 (or 1547 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The spelling of 139961906154 in words is "one hundred thirty-nine billion, nine hundred sixty-one million, nine hundred six thousand, one hundred fifty-four".