16537255397 has 32 divisors (see below), whose sum is σ = 18901787520. Its totient is φ = 14342676480.

The previous prime is 16537255379. The next prime is 16537255417. The reversal of 16537255397 is 79355273561.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16537255397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16537255337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21012638 + ... + 21013424.

It is an arithmetic number, because the mean of its divisors is an integer number (590680860).

Almost surely, 2^16537255397 is an apocalyptic number.

It is an amenable number.

16537255397 is a deficient number, since it is larger than the sum of its proper divisors (2364532123).

16537255397 is a wasteful number, since it uses less digits than its factorization.

16537255397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413.

The product of its digits is 5953500, while the sum is 53.

The spelling of 16537255397 in words is "sixteen billion, five hundred thirty-seven million, two hundred fifty-five thousand, three hundred ninety-seven".