72406621831099 has 2 divisors, whose sum is σ = 72406621831100. Its totient is φ = 72406621831098.

The previous prime is 72406621831091. The next prime is 72406621831183. The reversal of 72406621831099 is 99013812660427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72406621831099 - 2³ = 72406621831091 is a prime.

It is not a weakly prime, because it can be changed into another prime (72406621831091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36203310915549 + 36203310915550.

It is an arithmetic number, because the mean of its divisors is an integer number (36203310915550).

Almost surely, 2^{72406621831099} is an apocalyptic number.

72406621831099 is a deficient number, since it is larger than the sum of its proper divisors (1).

72406621831099 is an equidigital number, since it uses as much as digits as its factorization.

72406621831099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 72406621831099 in words is "seventy-two trillion, four hundred six billion, six hundred twenty-one million, eight hundred thirty-one thousand, ninety-nine".