72622851857 has 2 divisors, whose sum is σ = 72622851858. Its totient is φ = 72622851856.

The previous prime is 72622851839. The next prime is 72622851901. The reversal of 72622851857 is 75815822627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55660133776 + 16962718081 = 235924^2 + 130241^2 .

It is an emirp because it is prime and its reverse (75815822627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72622851857 - 2¹⁴ = 72622835473 is a prime.

It is a super-2 number, since 2×72622851857² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72622851799 and 72622851808.

It is not a weakly prime, because it can be changed into another prime (72622851557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36311425928 + 36311425929.

It is an arithmetic number, because the mean of its divisors is an integer number (36311425929).

Almost surely, 2^72622851857 is an apocalyptic number.

It is an amenable number.

72622851857 is a deficient number, since it is larger than the sum of its proper divisors (1).

72622851857 is an equidigital number, since it uses as much as digits as its factorization.

72622851857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3763200, while the sum is 53.

The spelling of 72622851857 in words is "seventy-two billion, six hundred twenty-two million, eight hundred fifty-one thousand, eight hundred fifty-seven".