72406621831039 has 4 divisors (see below), whose sum is σ = 73947188253024. Its totient is φ = 70866055409056.

The previous prime is 72406621831001. The next prime is 72406621831091. The reversal of 72406621831039 is 93013812660427.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72406621831039 - 2¹¹ = 72406621828991 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 (72406621831099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770283210922 + ... + 770283211015.

It is an arithmetic number, because the mean of its divisors is an integer number (18486797063256).

Almost surely, 2^{72406621831039} is an apocalyptic number.

72406621831039 is a deficient number, since it is larger than the sum of its proper divisors (1540566421985).

72406621831039 is a wasteful number, since it uses less digits than its factorization.

72406621831039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540566421984.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 72406621831039 in words is "seventy-two trillion, four hundred six billion, six hundred twenty-one million, eight hundred thirty-one thousand, thirty-nine".