72630537857 has 2 divisors, whose sum is σ = 72630537858. Its totient is φ = 72630537856.

The previous prime is 72630537767. The next prime is 72630537869. The reversal of 72630537857 is 75873503627.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56815966321 + 15814571536 = 238361^2 + 125756^2 .

It is a cyclic number.

It is not a de Polignac number, because 72630537857 - 2²⁴ = 72613760641 is a prime.

It is a super-2 number, since 2×72630537857² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72630537799 and 72630537808.

It is not a weakly prime, because it can be changed into another prime (72630537257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36315268928 + 36315268929.

It is an arithmetic number, because the mean of its divisors is an integer number (36315268929).

Almost surely, 2^72630537857 is an apocalyptic number.

It is an amenable number.

72630537857 is a deficient number, since it is larger than the sum of its proper divisors (1).

72630537857 is an equidigital number, since it uses as much as digits as its factorization.

72630537857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 72630537857 in words is "seventy-two billion, six hundred thirty million, five hundred thirty-seven thousand, eight hundred fifty-seven".