139485265920 has 2160 divisors, whose sum is σ = 685288513728. Its totient is φ = 26754416640.

The previous prime is 139485265859. The next prime is 139485265943. The reversal of 139485265920 is 29562584931.

139485265920 is a `hidden beast` number, since 1 + 3 + 9 + 48 + 5 + 2 + 6 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2160).

It is a super-2 number, since 2×139485265920² (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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10729635834 + ... + 10729635846.

Almost surely, 2^139485265920 is an apocalyptic number.

139485265920 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 139485265920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342644256864).

139485265920 is an abundant number, since it is smaller than the sum of its proper divisors (545803247808).

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

139485265920 is an equidigital number, since it uses as much as digits as its factorization.

139485265920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 139485265920 in words is "one hundred thirty-nine billion, four hundred eighty-five million, two hundred sixty-five thousand, nine hundred twenty".