72526270121 has 4 divisors (see below), whose sum is σ = 73055659092. Its totient is φ = 71996881152.

The previous prime is 72526270051. The next prime is 72526270169. The reversal of 72526270121 is 12107262527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12107262527 = 109 ⋅111075803.

It can be written as a sum of positive squares in 2 ways, for example, as 38205002521 + 34321267600 = 195461^2 + 185260^2 .

It is a cyclic number.

It is not a de Polignac number, because 72526270121 - 2²² = 72522075817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72526270171) 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, 264694280 + ... + 264694553.

It is an arithmetic number, because the mean of its divisors is an integer number (18263914773).

Almost surely, 2^72526270121 is an apocalyptic number.

It is an amenable number.

72526270121 is a deficient number, since it is larger than the sum of its proper divisors (529388971).

72526270121 is a wasteful number, since it uses less digits than its factorization.

72526270121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529388970.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 72526270121 in words is "seventy-two billion, five hundred twenty-six million, two hundred seventy thousand, one hundred twenty-one".