626061881 has 2 divisors, whose sum is σ = 626061882. Its totient is φ = 626061880.

The previous prime is 626061871. The next prime is 626061929. The reversal of 626061881 is 188160626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 587820025 + 38241856 = 24245^2 + 6184^2 .

It is a cyclic number.

It is not a de Polignac number, because 626061881 - 2²² = 621867577 is a prime.

It is a super-2 number, since 2×626061881² = 783906957682516322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (626061871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313030940 + 313030941.

It is an arithmetic number, because the mean of its divisors is an integer number (313030941).

Almost surely, 2^626061881 is an apocalyptic number.

It is an amenable number.

626061881 is a deficient number, since it is larger than the sum of its proper divisors (1).

626061881 is an equidigital number, since it uses as much as digits as its factorization.

626061881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 626061881 is about 25021.2286069250. The cubic root of 626061881 is about 855.4719102954.

The spelling of 626061881 in words is "six hundred twenty-six million, sixty-one thousand, eight hundred eighty-one".