72621455 has 8 divisors (see below), whose sum is σ = 89271504. Its totient is φ = 56680000.

The previous prime is 72621443. The next prime is 72621463. The reversal of 72621455 is 55412627.

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

It is not a de Polignac number, because 72621455 - 2⁶ = 72621391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176921 + ... + 177330.

It is an arithmetic number, because the mean of its divisors is an integer number (11158938).

Almost surely, 2^72621455 is an apocalyptic number.

72621455 is a deficient number, since it is larger than the sum of its proper divisors (16650049).

72621455 is a wasteful number, since it uses less digits than its factorization.

72621455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354297.

The product of its digits is 16800, while the sum is 32.

The square root of 72621455 is about 8521.8222816485. The cubic root of 72621455 is about 417.2102618796.

The spelling of 72621455 in words is "seventy-two million, six hundred twenty-one thousand, four hundred fifty-five".