2640767451 has 8 divisors (see below), whose sum is σ = 4024026624. Its totient is φ = 1509009960.

The previous prime is 2640767449. The next prime is 2640767477. The reversal of 2640767451 is 1547670462.

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

It is not a de Polignac number, because 2640767451 - 2¹ = 2640767449 is a prime.

It is a super-2 number, since 2×2640767451² = 13947305460522074802, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2640767411) 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, 62875395 + ... + 62875436.

It is an arithmetic number, because the mean of its divisors is an integer number (503003328).

Almost surely, 2^2640767451 is an apocalyptic number.

2640767451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2640767451 is a deficient number, since it is larger than the sum of its proper divisors (1383259173).

2640767451 is a wasteful number, since it uses less digits than its factorization.

2640767451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125750841.

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 2640767451 is about 51388.3980193973. The cubic root of 2640767451 is about 1382.2185575527.

The spelling of 2640767451 in words is "two billion, six hundred forty million, seven hundred sixty-seven thousand, four hundred fifty-one".