72150279155 has 4 divisors (see below), whose sum is σ = 86580334992. Its totient is φ = 57720223320.

The previous prime is 72150279151. The next prime is 72150279163. The reversal of 72150279155 is 55197205127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55197205127 = 6113 ⋅9029479.

It is not a de Polignac number, because 72150279155 - 2² = 72150279151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72150279151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7215027911 + ... + 7215027920.

It is an arithmetic number, because the mean of its divisors is an integer number (21645083748).

Almost surely, 2^72150279155 is an apocalyptic number.

72150279155 is a deficient number, since it is larger than the sum of its proper divisors (14430055837).

72150279155 is a wasteful number, since it uses less digits than its factorization.

72150279155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14430055836.

The product of its (nonzero) digits is 220500, while the sum is 44.

The spelling of 72150279155 in words is "seventy-two billion, one hundred fifty million, two hundred seventy-nine thousand, one hundred fifty-five".