72825681 has 8 divisors (see below), whose sum is σ = 97172320. Its totient is φ = 48514752.

The previous prime is 72825679. The next prime is 72825691. The reversal of 72825681 is 18652827.

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

It is not a de Polignac number, because 72825681 - 2¹ = 72825679 is a prime.

It is a super-2 number, since 2×72825681² = 10607159626227522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72825601) 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, 3736 + ... + 12633.

It is an arithmetic number, because the mean of its divisors is an integer number (12146540).

Almost surely, 2^72825681 is an apocalyptic number.

It is an amenable number.

72825681 is a deficient number, since it is larger than the sum of its proper divisors (24346639).

72825681 is a wasteful number, since it uses less digits than its factorization.

72825681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17855.

The product of its digits is 53760, while the sum is 39.

The square root of 72825681 is about 8533.7964001961. The cubic root of 72825681 is about 417.6009886337.

The spelling of 72825681 in words is "seventy-two million, eight hundred twenty-five thousand, six hundred eighty-one".