16766831457 has 6 divisors (see below), whose sum is σ = 24218756562. Its totient is φ = 11177887632.

The previous prime is 16766831449. The next prime is 16766831489. The reversal of 16766831457 is 75413866761.

It can be written as a sum of positive squares in only one way, i.e., 16007057361 + 759774096 = 126519^2 + 27564^2 .

It is not a de Polignac number, because 16766831457 - 2³ = 16766831449 is a prime.

It is a super-2 number, since 2×16766831457² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16766831437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 931490628 + ... + 931490645.

It is an arithmetic number, because the mean of its divisors is an integer number (4036459427).

Almost surely, 2^16766831457 is an apocalyptic number.

It is an amenable number.

16766831457 is a deficient number, since it is larger than the sum of its proper divisors (7451925105).

16766831457 is a wasteful number, since it uses less digits than its factorization.

16766831457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862981279 (or 1862981276 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 16766831457 in words is "sixteen billion, seven hundred sixty-six million, eight hundred thirty-one thousand, four hundred fifty-seven".