139646463840 has 576 divisors, whose sum is σ = 532086976512. Its totient is φ = 33119539200.

The previous prime is 139646463823. The next prime is 139646463889. The reversal of 139646463840 is 48364646931.

It is a happy number.

139646463840 is a `hidden beast` number, since 13 + 96 + 4 + 6 + 463 + 84 + 0 = 666.

It is a super-2 number, since 2×139646463840² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 192085557 + ... + 192086283.

It is an arithmetic number, because the mean of its divisors is an integer number (923762112).

Almost surely, 2^139646463840 is an apocalyptic number.

139646463840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139646463840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266043488256).

139646463840 is an abundant number, since it is smaller than the sum of its proper divisors (392440512672).

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

139646463840 is a wasteful number, since it uses less digits than its factorization.

139646463840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 139646463840 in words is "one hundred thirty-nine billion, six hundred forty-six million, four hundred sixty-three thousand, eight hundred forty".