3651651731 has 32 divisors (see below), whose sum is σ = 4785661440. Its totient is φ = 2703868416.

The previous prime is 3651651721. The next prime is 3651651739. The reversal of 3651651731 is 1371561563.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3651651731 - 2¹⁰ = 3651650707 is a prime.

It is a super-2 number, since 2×3651651731² = 26669120729030592722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3651651739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270320 + ... + 283506.

It is an arithmetic number, because the mean of its divisors is an integer number (149551920).

Almost surely, 2^3651651731 is an apocalyptic number.

3651651731 is a deficient number, since it is larger than the sum of its proper divisors (1134009709).

3651651731 is a wasteful number, since it uses less digits than its factorization.

3651651731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13403.

The product of its digits is 56700, while the sum is 38.

The square root of 3651651731 is about 60428.8981448446. The cubic root of 3651651731 is about 1539.9139395040.

The spelling of 3651651731 in words is "three billion, six hundred fifty-one million, six hundred fifty-one thousand, seven hundred thirty-one".