626855881 has 2 divisors, whose sum is σ = 626855882. Its totient is φ = 626855880.

The previous prime is 626855843. The next prime is 626855893. The reversal of 626855881 is 188558626.

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., 507150400 + 119705481 = 22520^2 + 10941^2 .

It is a cyclic number.

It is not a de Polignac number, because 626855881 - 2¹⁷ = 626724809 is a prime.

It is a super-2 number, since 2×626855881² = 785896591088572322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (626855821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313427940 + 313427941.

It is an arithmetic number, because the mean of its divisors is an integer number (313427941).

Almost surely, 2^626855881 is an apocalyptic number.

It is an amenable number.

626855881 is a deficient number, since it is larger than the sum of its proper divisors (1).

626855881 is an equidigital number, since it uses as much as digits as its factorization.

626855881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 921600, while the sum is 49.

The square root of 626855881 is about 25037.0901064800. The cubic root of 626855881 is about 855.8334069088.

The spelling of 626855881 in words is "six hundred twenty-six million, eight hundred fifty-five thousand, eight hundred eighty-one".