54640743731 has 12 divisors (see below), whose sum is σ = 63566814960. Its totient is φ = 46831140720.

The previous prime is 54640743727. The next prime is 54640743821. The reversal of 54640743731 is 13734704645.

It is a happy number.

It is not a de Polignac number, because 54640743731 - 2² = 54640743727 is a prime.

It is a super-2 number, since 2×54640743731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54640743701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 688610 + ... + 763848.

It is an arithmetic number, because the mean of its divisors is an integer number (5297234580).

Almost surely, 2^54640743731 is an apocalyptic number.

54640743731 is a deficient number, since it is larger than the sum of its proper divisors (8926071229).

54640743731 is a wasteful number, since it uses less digits than its factorization.

54640743731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90074 (or 90067 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 44.

The spelling of 54640743731 in words is "fifty-four billion, six hundred forty million, seven hundred forty-three thousand, seven hundred thirty-one".