72436409879 has 4 divisors (see below), whose sum is σ = 76697375184. Its totient is φ = 68175444576.

The previous prime is 72436409861. The next prime is 72436409887. The reversal of 72436409879 is 97890463427.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72436409879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72436409839) 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, 2130482627 + ... + 2130482660.

It is an arithmetic number, because the mean of its divisors is an integer number (19174343796).

Almost surely, 2^72436409879 is an apocalyptic number.

72436409879 is a deficient number, since it is larger than the sum of its proper divisors (4260965305).

72436409879 is a wasteful number, since it uses less digits than its factorization.

72436409879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260965304.

The product of its (nonzero) digits is 18289152, while the sum is 59.

The spelling of 72436409879 in words is "seventy-two billion, four hundred thirty-six million, four hundred nine thousand, eight hundred seventy-nine".