72645074307477 has 24 divisors (see below), whose sum is σ = 120072494295936. Its totient is φ = 41459386347936.

The previous prime is 72645074307437. The next prime is 72645074307527. The reversal of 72645074307477 is 77470347054627.

It is a happy number.

72645074307477 is a `hidden beast` number, since 7 + 2 + 6 + 450 + 7 + 43 + 0 + 74 + 77 = 666.

It is not a de Polignac number, because 72645074307477 - 2⁷ = 72645074307349 is a prime.

It is a super-2 number, since 2×72645074307477² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72645074307427) 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, 723347793 + ... + 723448214.

It is an arithmetic number, because the mean of its divisors is an integer number (5003020595664).

Almost surely, 2^{72645074307477} is an apocalyptic number.

It is an amenable number.

72645074307477 is a deficient number, since it is larger than the sum of its proper divisors (47427419988459).

72645074307477 is a wasteful number, since it uses less digits than its factorization.

72645074307477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446796817 (or 1446796814 counting only the distinct ones).

The product of its (nonzero) digits is 193616640, while the sum is 63.

The spelling of 72645074307477 in words is "seventy-two trillion, six hundred forty-five billion, seventy-four million, three hundred seven thousand, four hundred seventy-seven".