15655405920 has 432 divisors, whose sum is σ = 63066520944. Its totient is φ = 3252480000.

The previous prime is 15655405879. The next prime is 15655405943. The reversal of 15655405920 is 2950455651.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2843170 + ... + 2848670.

It is an arithmetic number, because the mean of its divisors is an integer number (145987317).

Almost surely, 2^15655405920 is an apocalyptic number.

15655405920 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 15655405920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31533260472).

15655405920 is an abundant number, since it is smaller than the sum of its proper divisors (47411115024).

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

15655405920 is a wasteful number, since it uses less digits than its factorization.

15655405920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555 (or 5529 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 15655405920 in words is "fifteen billion, six hundred fifty-five million, four hundred five thousand, nine hundred twenty".