15780930165 has 256 divisors, whose sum is σ = 37945958400. Its totient is φ = 6045062400.

The previous prime is 15780930103. The next prime is 15780930239. The reversal of 15780930165 is 56103908751.

It is a happy number.

It is not a de Polignac number, because 15780930165 - 2⁷ = 15780930037 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 15780930165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 22837470 + ... + 22838160.

It is an arithmetic number, because the mean of its divisors is an integer number (148226400).

Almost surely, 2^15780930165 is an apocalyptic number.

15780930165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15780930165 is an abundant number, since it is smaller than the sum of its proper divisors (22165028235).

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

15780930165 is a wasteful number, since it uses less digits than its factorization.

15780930165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 15780930165 in words is "fifteen billion, seven hundred eighty million, nine hundred thirty thousand, one hundred sixty-five".