72073555 has 16 divisors (see below), whose sum is σ = 94183200. Its totient is φ = 52738560.

The previous prime is 72073553. The next prime is 72073567. The reversal of 72073555 is 55537027.

It is not a de Polignac number, because 72073555 - 2¹ = 72073553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72073555.

It is not an unprimeable number, because it can be changed into a prime (72073553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10326 + ... + 15835.

It is an arithmetic number, because the mean of its divisors is an integer number (5886450).

Almost surely, 2^72073555 is an apocalyptic number.

72073555 is a deficient number, since it is larger than the sum of its proper divisors (22109645).

72073555 is a wasteful number, since it uses less digits than its factorization.

72073555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26214.

The product of its (nonzero) digits is 36750, while the sum is 34.

The square root of 72073555 is about 8489.6145377750. The cubic root of 72073555 is about 416.1583835858.

The spelling of 72073555 in words is "seventy-two million, seventy-three thousand, five hundred fifty-five".