18545264761 has 9 divisors (see below), whose sum is σ = 18992576901. Its totient is φ = 18108259932.

The previous prime is 18545264753. The next prime is 18545264791. The reversal of 18545264761 is 16746254581.

The square root of 18545264761 is 136181.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 18545264761 - 2³ = 18545264753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18545264701) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5854200 + ... + 5857366.

Almost surely, 2^18545264761 is an apocalyptic number.

18545264761 is the 136181-st square number.

18545264761 is the 68091-st centered octagonal number.

It is an amenable number.

18545264761 is a deficient number, since it is larger than the sum of its proper divisors (447312140).

18545264761 is an frugal number, since it uses more digits than its factorization.

18545264761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6420 (or 3210 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 49.

Multiplying 18545264761 by its sum of digits (49), we get a square (908717973289 = 953267²).

The spelling of 18545264761 in words is "eighteen billion, five hundred forty-five million, two hundred sixty-four thousand, seven hundred sixty-one".