2640373631 has 8 divisors (see below), whose sum is σ = 3060071424. Its totient is φ = 2231301240.

The previous prime is 2640373621. The next prime is 2640373639. The reversal of 2640373631 is 1363730462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2640373631 - 2²² = 2636179327 is a prime.

It is a super-2 number, since 2×2640373631² = 13943145822560248322, 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 = 2640373591 and 2640373600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640373639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2655815 + ... + 2656808.

It is an arithmetic number, because the mean of its divisors is an integer number (382508928).

Almost surely, 2^2640373631 is an apocalyptic number.

2640373631 is a deficient number, since it is larger than the sum of its proper divisors (419697793).

2640373631 is an equidigital number, since it uses as much as digits as its factorization.

2640373631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312701.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 2640373631 is about 51384.5660777631. The cubic root of 2640373631 is about 1382.1498436423.

The spelling of 2640373631 in words is "two billion, six hundred forty million, three hundred seventy-three thousand, six hundred thirty-one".