72725649 has 8 divisors (see below), whose sum is σ = 100311360. Its totient is φ = 46811856.

The previous prime is 72725641. The next prime is 72725651. The reversal of 72725649 is 94652727.

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

It is not a de Polignac number, because 72725649 - 2³ = 72725641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72725649.

It is not an unprimeable number, because it can be changed into a prime (72725641) 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, 417877 + ... + 418050.

It is an arithmetic number, because the mean of its divisors is an integer number (12538920).

Almost surely, 2^72725649 is an apocalyptic number.

It is an amenable number.

72725649 is a deficient number, since it is larger than the sum of its proper divisors (27585711).

72725649 is a wasteful number, since it uses less digits than its factorization.

72725649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835959.

The product of its digits is 211680, while the sum is 42.

The square root of 72725649 is about 8527.9334542432. The cubic root of 72725649 is about 417.4096980407.

It can be divided in two parts, 7272 and 5649, that added together give a palindrome (12921).

The spelling of 72725649 in words is "seventy-two million, seven hundred twenty-five thousand, six hundred forty-nine".