2646920631 has 16 divisors (see below), whose sum is σ = 3569829120. Its totient is φ = 1744416960.

The previous prime is 2646920623. The next prime is 2646920659. The reversal of 2646920631 is 1360296462.

It is not a de Polignac number, because 2646920631 - 2³ = 2646920623 is a prime.

It is a super-2 number, since 2×2646920631² = 14012377653626876322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2646920631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646920611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90555 + ... + 116163.

It is an arithmetic number, because the mean of its divisors is an integer number (223114320).

Almost surely, 2^2646920631 is an apocalyptic number.

2646920631 is a deficient number, since it is larger than the sum of its proper divisors (922908489).

2646920631 is a wasteful number, since it uses less digits than its factorization.

2646920631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26006.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 2646920631 is about 51448.2325352388. The cubic root of 2646920631 is about 1383.2912813591.

The spelling of 2646920631 in words is "two billion, six hundred forty-six million, nine hundred twenty thousand, six hundred thirty-one".