5651685631 has 4 divisors (see below), whose sum is σ = 5789531664. Its totient is φ = 5513839600.

The previous prime is 5651685629. The next prime is 5651685647. The reversal of 5651685631 is 1365861565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1365861565 = 5 ⋅273172313.

It is a cyclic number.

It is not a de Polignac number, because 5651685631 - 2¹ = 5651685629 is a prime.

It is a super-2 number, since 2×5651685631² = 63883100943303736322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5651685601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68922955 + ... + 68923036.

It is an arithmetic number, because the mean of its divisors is an integer number (1447382916).

Almost surely, 2^5651685631 is an apocalyptic number.

5651685631 is a deficient number, since it is larger than the sum of its proper divisors (137846033).

5651685631 is a wasteful number, since it uses less digits than its factorization.

5651685631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137846032.

The product of its digits is 648000, while the sum is 46.

The square root of 5651685631 is about 75177.6937063116. The cubic root of 5651685631 is about 1781.2545999824.

The spelling of 5651685631 in words is "five billion, six hundred fifty-one million, six hundred eighty-five thousand, six hundred thirty-one".