139427632520 has 64 divisors (see below), whose sum is σ = 342695361600. Its totient is φ = 50632231680.

The previous prime is 139427632499. The next prime is 139427632613. The reversal of 139427632520 is 25236724931.

It is a super-3 number, since 3×139427632520³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110762 + ... + 539558.

It is an arithmetic number, because the mean of its divisors is an integer number (5354615025).

Almost surely, 2^139427632520 is an apocalyptic number.

139427632520 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 139427632520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171347680800).

139427632520 is an abundant number, since it is smaller than the sum of its proper divisors (203267729080).

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

139427632520 is a wasteful number, since it uses less digits than its factorization.

139427632520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429558 (or 429554 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 139427632520 in words is "one hundred thirty-nine billion, four hundred twenty-seven million, six hundred thirty-two thousand, five hundred twenty".