16402957956 has 648 divisors, whose sum is σ = 57044053248. Its totient is φ = 3951763200.

The previous prime is 16402957939. The next prime is 16402957979. The reversal of 16402957956 is 65975920461.

16402957956 is a `hidden beast` number, since 1 + 6 + 40 + 29 + 579 + 5 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 244820235 + ... + 244820301.

Almost surely, 2^16402957956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16402957956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28522026624).

16402957956 is an abundant number, since it is smaller than the sum of its proper divisors (40641095292).

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

16402957956 is a wasteful number, since it uses less digits than its factorization.

16402957956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 16402957956 in words is "sixteen billion, four hundred two million, nine hundred fifty-seven thousand, nine hundred fifty-six".