72477538497 has 24 divisors (see below), whose sum is σ = 128848958784. Its totient is φ = 38229909984.

The previous prime is 72477538487. The next prime is 72477538571. The reversal of 72477538497 is 79483577427.

72477538497 is a `hidden beast` number, since 7 + 2 + 4 + 7 + 7 + 538 + 4 + 97 = 666.

It is not a de Polignac number, because 72477538497 - 2¹⁸ = 72477276353 is a prime.

It is a super-3 number, since 3×72477538497³ (a number of 34 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (72477538447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44246763 + ... + 44248400.

It is an arithmetic number, because the mean of its divisors is an integer number (5368706616).

Almost surely, 2^72477538497 is an apocalyptic number.

It is an amenable number.

72477538497 is a deficient number, since it is larger than the sum of its proper divisors (56371420287).

72477538497 is a wasteful number, since it uses less digits than its factorization.

72477538497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88495189 (or 88495186 counting only the distinct ones).

The product of its digits is 82978560, while the sum is 63.

The spelling of 72477538497 in words is "seventy-two billion, four hundred seventy-seven million, five hundred thirty-eight thousand, four hundred ninety-seven".