16356551957 has 8 divisors (see below), whose sum is σ = 16936982040. Its totient is φ = 15777216000.

The previous prime is 16356551951. The next prime is 16356551971. The reversal of 16356551957 is 75915565361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11488838596 + 4867713361 = 107186^2 + 69769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16356551957 - 2¹⁰ = 16356550933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16356551899 and 16356551908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16356551951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243044 + ... + 302957.

It is an arithmetic number, because the mean of its divisors is an integer number (2117122755).

Almost surely, 2^16356551957 is an apocalyptic number.

It is an amenable number.

16356551957 is a deficient number, since it is larger than the sum of its proper divisors (580430083).

16356551957 is a wasteful number, since it uses less digits than its factorization.

16356551957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547063.

The product of its digits is 4252500, while the sum is 53.

The spelling of 16356551957 in words is "sixteen billion, three hundred fifty-six million, five hundred fifty-one thousand, nine hundred fifty-seven".