15797497550 has 24 divisors (see below), whose sum is σ = 29437708872. Its totient is φ = 6307308000.

The previous prime is 15797497549. The next prime is 15797497559. The reversal of 15797497550 is 5579479751.

It is a self number, because there is not a number n which added to its sum of digits gives 15797497550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15797497559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264956 + ... + 319055.

It is an arithmetic number, because the mean of its divisors is an integer number (1226571203).

Almost surely, 2^15797497550 is an apocalyptic number.

15797497550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15797497550 is a deficient number, since it is larger than the sum of its proper divisors (13640211322).

15797497550 is a wasteful number, since it uses less digits than its factorization.

15797497550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584564 (or 584559 counting only the distinct ones).

The product of its (nonzero) digits is 13891500, while the sum is 59.

The spelling of 15797497550 in words is "fifteen billion, seven hundred ninety-seven million, four hundred ninety-seven thousand, five hundred fifty".