16257945381 has 16 divisors (see below), whose sum is σ = 22428499968. Its totient is φ = 10464634800.

The previous prime is 16257945349. The next prime is 16257945397. The reversal of 16257945381 is 18354975261.

It is not a de Polignac number, because 16257945381 - 2⁵ = 16257945349 is a prime.

It is a super-2 number, since 2×16257945381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16257945311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162721 + ... + 242886.

It is an arithmetic number, because the mean of its divisors is an integer number (1401781248).

Almost surely, 2^16257945381 is an apocalyptic number.

It is an amenable number.

16257945381 is a deficient number, since it is larger than the sum of its proper divisors (6170554587).

16257945381 is a wasteful number, since it uses less digits than its factorization.

16257945381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406072.

The product of its digits is 1814400, while the sum is 51.

The spelling of 16257945381 in words is "sixteen billion, two hundred fifty-seven million, nine hundred forty-five thousand, three hundred eighty-one".