139725350640 has 240 divisors, whose sum is σ = 475464880800. Its totient is φ = 36767858688.

The previous prime is 139725350593. The next prime is 139725350669. The reversal of 139725350640 is 46053527931.

139725350640 is a `hidden beast` number, since 1 + 3 + 9 + 72 + 535 + 0 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×139725350640² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36972271 + ... + 36976049.

It is an arithmetic number, because the mean of its divisors is an integer number (1981103670).

Almost surely, 2^139725350640 is an apocalyptic number.

139725350640 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 139725350640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237732440400).

139725350640 is an abundant number, since it is smaller than the sum of its proper divisors (335739530160).

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

139725350640 is a wasteful number, since it uses less digits than its factorization.

139725350640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464 (or 4455 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 45.

The spelling of 139725350640 in words is "one hundred thirty-nine billion, seven hundred twenty-five million, three hundred fifty thousand, six hundred forty".