72556881 has 8 divisors (see below), whose sum is σ = 100948800. Its totient is φ = 46268112.

The previous prime is 72556879. The next prime is 72556903. The reversal of 72556881 is 18865527.

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

It is not a de Polignac number, because 72556881 - 2¹ = 72556879 is a prime.

It is a super-2 number, since 2×72556881² = 10529001960896322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72556381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525706 + ... + 525843.

It is an arithmetic number, because the mean of its divisors is an integer number (12618600).

Almost surely, 2^72556881 is an apocalyptic number.

It is an amenable number.

72556881 is a deficient number, since it is larger than the sum of its proper divisors (28391919).

72556881 is a wasteful number, since it uses less digits than its factorization.

72556881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051575.

The product of its digits is 134400, while the sum is 42.

The square root of 72556881 is about 8518.0326954057. The cubic root of 72556881 is about 417.0865659986.

It can be divided in two parts, 72556 and 881, that added together give a palindrome (73437).

The spelling of 72556881 in words is "seventy-two million, five hundred fifty-six thousand, eight hundred eighty-one".