49661631 has 6 divisors (see below), whose sum is σ = 71733480. Its totient is φ = 33107748.

The previous prime is 49661617. The next prime is 49661663. The reversal of 49661631 is 13616694.

49661631 is a `hidden beast` number, since 4 + 9 + 6 + 616 + 31 = 666.

It is not a de Polignac number, because 49661631 - 2⁹ = 49661119 is a prime.

It is a super-2 number, since 2×49661631² = 4932555187160322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49661671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2758971 + ... + 2758988.

It is an arithmetic number, because the mean of its divisors is an integer number (11955580).

Almost surely, 2^49661631 is an apocalyptic number.

49661631 is a deficient number, since it is larger than the sum of its proper divisors (22071849).

49661631 is a wasteful number, since it uses less digits than its factorization.

49661631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517965 (or 5517962 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 49661631 is about 7047.1008932752. The cubic root of 49661631 is about 367.5702267570.

The spelling of 49661631 in words is "forty-nine million, six hundred sixty-one thousand, six hundred thirty-one".