72556865527 has 4 divisors (see below), whose sum is σ = 74326545216. Its totient is φ = 70787185840.

The previous prime is 72556865489. The next prime is 72556865617.

72556865527 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72556865527 - 2¹¹ = 72556863479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72556862527) 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 3 ways as a sum of consecutive naturals, for example, 884839783 + ... + 884839864.

It is an arithmetic number, because the mean of its divisors is an integer number (18581636304).

Almost surely, 2^72556865527 is an apocalyptic number.

72556865527 is a deficient number, since it is larger than the sum of its proper divisors (1769679689).

72556865527 is a wasteful number, since it uses less digits than its factorization.

72556865527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769679688.

The product of its digits is 35280000, while the sum is 58.

The spelling of 72556865527 in words is "seventy-two billion, five hundred fifty-six million, eight hundred sixty-five thousand, five hundred twenty-seven".