45191918331 has 32 divisors (see below), whose sum is σ = 76540147200. Its totient is φ = 25815607200.

The previous prime is 45191918311. The next prime is 45191918341. The reversal of 45191918331 is 13381919154.

45191918331 is a `hidden beast` number, since 45 + 191 + 91 + 8 + 331 = 666.

It is not a de Polignac number, because 45191918331 - 2¹⁰ = 45191917307 is a prime.

It is a super-2 number, since 2×45191918331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45191918311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573256 + ... + 647306.

It is an arithmetic number, because the mean of its divisors is an integer number (2391879600).

Almost surely, 2^45191918331 is an apocalyptic number.

45191918331 is a deficient number, since it is larger than the sum of its proper divisors (31348228869).

45191918331 is a wasteful number, since it uses less digits than its factorization.

45191918331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77296 (or 77290 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The spelling of 45191918331 in words is "forty-five billion, one hundred ninety-one million, nine hundred eighteen thousand, three hundred thirty-one".