16972517949 has 24 divisors (see below), whose sum is σ = 24400345536. Its totient is φ = 10473883200.

The previous prime is 16972517929. The next prime is 16972517957. The reversal of 16972517949 is 94971527961.

It is not a de Polignac number, because 16972517949 - 2¹² = 16972513853 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16972517892 and 16972517901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16972517909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61672 + ... + 194289.

It is an arithmetic number, because the mean of its divisors is an integer number (1016681064).

Almost surely, 2^16972517949 is an apocalyptic number.

It is an amenable number.

16972517949 is a deficient number, since it is larger than the sum of its proper divisors (7427827587).

16972517949 is a wasteful number, since it uses less digits than its factorization.

16972517949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256049 (or 256018 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 60.

The spelling of 16972517949 in words is "sixteen billion, nine hundred seventy-two million, five hundred seventeen thousand, nine hundred forty-nine".