72406621831037 has 8 divisors (see below), whose sum is σ = 78000510782040. Its totient is φ = 66816182710080.

The previous prime is 72406621831001. The next prime is 72406621831091. The reversal of 72406621831037 is 73013812660427.

It can be written as a sum of positive squares in 4 ways, for example, as 5486139747001 + 66920482084036 = 2342251^2 + 8180494^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72406621831037 - 2³⁰ = 72405548089213 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 (72406621831937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 862413914 + ... + 862497867.

It is an arithmetic number, because the mean of its divisors is an integer number (9750063847755).

Almost surely, 2^{72406621831037} is an apocalyptic number.

It is an amenable number.

72406621831037 is a deficient number, since it is larger than the sum of its proper divisors (5593888951003).

72406621831037 is a wasteful number, since it uses less digits than its factorization.

72406621831037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724915023.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 72406621831037 in words is "seventy-two trillion, four hundred six billion, six hundred twenty-one million, eight hundred thirty-one thousand, thirty-seven".