72623632639 has 2 divisors, whose sum is σ = 72623632640. Its totient is φ = 72623632638.

The previous prime is 72623632561. The next prime is 72623632657. The reversal of 72623632639 is 93623632627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72623632639 - 2²⁹ = 72086761727 is a prime.

It is a super-2 number, since 2×72623632639² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72623632592 and 72623632601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72623632139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36311816319 + 36311816320.

It is an arithmetic number, because the mean of its divisors is an integer number (36311816320).

Almost surely, 2^72623632639 is an apocalyptic number.

72623632639 is a deficient number, since it is larger than the sum of its proper divisors (1).

72623632639 is an equidigital number, since it uses as much as digits as its factorization.

72623632639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 49.

The spelling of 72623632639 in words is "seventy-two billion, six hundred twenty-three million, six hundred thirty-two thousand, six hundred thirty-nine".