72750155 has 8 divisors (see below), whose sum is σ = 87378912. Its totient is φ = 58147648.

The previous prime is 72750137. The next prime is 72750169. The reversal of 72750155 is 55105727.

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

It is a cyclic number.

It is not a de Polignac number, because 72750155 - 2²⁶ = 5641291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167 + ... + 12063.

It is an arithmetic number, because the mean of its divisors is an integer number (10922364).

Almost surely, 2^72750155 is an apocalyptic number.

72750155 is a deficient number, since it is larger than the sum of its proper divisors (14628757).

72750155 is a wasteful number, since it uses less digits than its factorization.

72750155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13125.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 72750155 is about 8529.3701408721. The cubic root of 72750155 is about 417.4565769317.

The spelling of 72750155 in words is "seventy-two million, seven hundred fifty thousand, one hundred fifty-five".