72534643527 has 32 divisors (see below), whose sum is σ = 101800387584. Its totient is φ = 45878918400.

The previous prime is 72534643507. The next prime is 72534643549.

72534643527 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 72534643527 - 2⁸ = 72534643271 is a prime.

It is a super-2 number, since 2×72534643527² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72534643507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17141502 + ... + 17145732.

It is an arithmetic number, because the mean of its divisors is an integer number (3181262112).

Almost surely, 2^72534643527 is an apocalyptic number.

72534643527 is a deficient number, since it is larger than the sum of its proper divisors (29265744057).

72534643527 is a wasteful number, since it uses less digits than its factorization.

72534643527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8079.

The product of its digits is 4233600, while the sum is 48.

The spelling of 72534643527 in words is "seventy-two billion, five hundred thirty-four million, six hundred forty-three thousand, five hundred twenty-seven".