61626631 has 8 divisors (see below), whose sum is σ = 67786128. Its totient is φ = 56023000.

The previous prime is 61626629. The next prime is 61626647. The reversal of 61626631 is 13662616.

61626631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61626631 - 2¹ = 61626629 is a prime.

It is a super-2 number, since 2×61626631² = 7595683296820322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61626593 and 61626602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61626601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21820 + ... + 24481.

It is an arithmetic number, because the mean of its divisors is an integer number (8473266).

Almost surely, 2^61626631 is an apocalyptic number.

61626631 is a deficient number, since it is larger than the sum of its proper divisors (6159497).

61626631 is an equidigital number, since it uses as much as digits as its factorization.

61626631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46334 (or 46312 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 61626631 is about 7850.2631166095. The cubic root of 61626631 is about 394.9930693651.

The spelling of 61626631 in words is "sixty-one million, six hundred twenty-six thousand, six hundred thirty-one".