16813217457 has 24 divisors (see below), whose sum is σ = 24815756160. Its totient is φ = 10964453280.

The previous prime is 16813217437. The next prime is 16813217459. The reversal of 16813217457 is 75471231861.

16813217457 is a `hidden beast` number, since 1 + 68 + 132 + 1 + 7 + 457 = 666.

It is not a de Polignac number, because 16813217457 - 2¹¹ = 16813215409 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (16813217459) 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, 865582 + ... + 884792.

It is an arithmetic number, because the mean of its divisors is an integer number (1033989840).

Almost surely, 2^16813217457 is an apocalyptic number.

It is an amenable number.

16813217457 is a deficient number, since it is larger than the sum of its proper divisors (8002538703).

16813217457 is a wasteful number, since it uses less digits than its factorization.

16813217457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21333 (or 21330 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

It can be divided in two parts, 16813 and 217457, that added together give a triangular number (234270 = T₆₈₄).

The spelling of 16813217457 in words is "sixteen billion, eight hundred thirteen million, two hundred seventeen thousand, four hundred fifty-seven".