72655530678647 has 8 divisors (see below), whose sum is σ = 83053250606976. Its totient is φ = 62262400351032.

The previous prime is 72655530678613. The next prime is 72655530678673. The reversal of 72655530678647 is 74687603555627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72655530678647 - 2¹⁰ = 72655530677623 is a prime.

It is a super-2 number, since 2×72655530678647² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72655530678347) 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 7 ways as a sum of consecutive naturals, for example, 1147366253 + ... + 1147429574.

It is an arithmetic number, because the mean of its divisors is an integer number (10381656325872).

Almost surely, 2^{72655530678647} is an apocalyptic number.

72655530678647 is a deficient number, since it is larger than the sum of its proper divisors (10397719928329).

72655530678647 is a wasteful number, since it uses less digits than its factorization.

72655530678647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294800357.

The product of its (nonzero) digits is 1778112000, while the sum is 71.

The spelling of 72655530678647 in words is "seventy-two trillion, six hundred fifty-five billion, five hundred thirty million, six hundred seventy-eight thousand, six hundred forty-seven".