139891665408 has 320 divisors, whose sum is σ = 441794580480. Its totient is φ = 38862028800.

The previous prime is 139891665373. The next prime is 139891665409. The reversal of 139891665408 is 804566198931.

It is not an unprimeable number, because it can be changed into a prime (139891665409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9944716 + ... + 9958772.

It is an arithmetic number, because the mean of its divisors is an integer number (1380608064).

Almost surely, 2^139891665408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139891665408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220897290240).

139891665408 is an abundant number, since it is smaller than the sum of its proper divisors (301902915072).

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

139891665408 is a wasteful number, since it uses less digits than its factorization.

139891665408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14139 (or 14123 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 139891665408 in words is "one hundred thirty-nine billion, eight hundred ninety-one million, six hundred sixty-five thousand, four hundred eight".