15797220500 has 48 divisors (see below), whose sum is σ = 35085960000. Its totient is φ = 6211776800.

The previous prime is 15797220493. The next prime is 15797220581. The reversal of 15797220500 is 502279751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238250 + ... + 297249.

It is an arithmetic number, because the mean of its divisors is an integer number (730957500).

Almost surely, 2^15797220500 is an apocalyptic number.

15797220500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15797220500 is an abundant number, since it is smaller than the sum of its proper divisors (19288739500).

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

15797220500 is a wasteful number, since it uses less digits than its factorization.

15797220500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535577 (or 535565 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 15797220500 in words is "fifteen billion, seven hundred ninety-seven million, two hundred twenty thousand, five hundred".