72055505 has 16 divisors (see below), whose sum is σ = 92179200. Its totient is φ = 53913600.

The previous prime is 72055493. The next prime is 72055513. The reversal of 72055505 is 50555027.

It is a de Polignac number, because none of the positive numbers 2^k-72055505 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2705 + ... + 12305.

It is an arithmetic number, because the mean of its divisors is an integer number (5761200).

Almost surely, 2^72055505 is an apocalyptic number.

It is an amenable number.

72055505 is a deficient number, since it is larger than the sum of its proper divisors (20123695).

72055505 is a wasteful number, since it uses less digits than its factorization.

72055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9704.

The product of its (nonzero) digits is 8750, while the sum is 29.

The square root of 72055505 is about 8488.5514076313. The cubic root of 72055505 is about 416.1236399781.

The spelling of 72055505 in words is "seventy-two million, fifty-five thousand, five hundred five".