54090493731 has 48 divisors (see below), whose sum is σ = 85128226560. Its totient is φ = 32991456960.

The previous prime is 54090493643. The next prime is 54090493739. The reversal of 54090493731 is 13739409045.

54090493731 is a `hidden beast` number, since 5 + 4 + 0 + 90 + 493 + 73 + 1 = 666.

It is not a de Polignac number, because 54090493731 - 2²² = 54086299427 is a prime.

It is a super-2 number, since 2×54090493731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54090493739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 600216 + ... + 684426.

It is an arithmetic number, because the mean of its divisors is an integer number (1773504720).

Almost surely, 2^54090493731 is an apocalyptic number.

54090493731 is a deficient number, since it is larger than the sum of its proper divisors (31037732829).

54090493731 is a wasteful number, since it uses less digits than its factorization.

54090493731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84376 (or 84373 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 54090493731 in words is "fifty-four billion, ninety million, four hundred ninety-three thousand, seven hundred thirty-one".