72661123835 has 32 divisors (see below), whose sum is σ = 93995225280. Its totient is φ = 53727141888.

The previous prime is 72661123823. The next prime is 72661123837. The reversal of 72661123835 is 53832116627.

It is a cyclic number.

It is not a de Polignac number, because 72661123835 - 2²⁰ = 72660075259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72661123837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1012244 + ... + 1081646.

It is an arithmetic number, because the mean of its divisors is an integer number (2937350790).

Almost surely, 2^72661123835 is an apocalyptic number.

72661123835 is a deficient number, since it is larger than the sum of its proper divisors (21334101445).

72661123835 is a wasteful number, since it uses less digits than its factorization.

72661123835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69647.

The product of its digits is 362880, while the sum is 44.

The spelling of 72661123835 in words is "seventy-two billion, six hundred sixty-one million, one hundred twenty-three thousand, eight hundred thirty-five".