139615552440 has 384 divisors, whose sum is σ = 560090643840. Its totient is φ = 29371465728.

The previous prime is 139615552421. The next prime is 139615552451. The reversal of 139615552440 is 44255516931.

It is a happy number.

139615552440 is a `hidden beast` number, since 1 + 3 + 9 + 6 + 155 + 52 + 440 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 95 ways as a sum of consecutive naturals, for example, 11558244 + ... + 11570316.

It is an arithmetic number, because the mean of its divisors is an integer number (1458569385).

Almost surely, 2^139615552440 is an apocalyptic number.

139615552440 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 139615552440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280045321920).

139615552440 is an abundant number, since it is smaller than the sum of its proper divisors (420475091400).

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

139615552440 is a wasteful number, since it uses less digits than its factorization.

139615552440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12463 (or 12456 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 139615552440 in words is "one hundred thirty-nine billion, six hundred fifteen million, five hundred fifty-two thousand, four hundred forty".