2457815646 has 48 divisors (see below), whose sum is σ = 5818779792. Its totient is φ = 687498240.

The previous prime is 2457815641. The next prime is 2457815669. The reversal of 2457815646 is 6465187542.

It is a junction number, because it is equal to n+sod(n) for n = 2457815595 and 2457815604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2457815641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120771 + ... + 139646.

It is an arithmetic number, because the mean of its divisors is an integer number (121224579).

Almost surely, 2^2457815646 is an apocalyptic number.

2457815646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2457815646 is an abundant number, since it is smaller than the sum of its proper divisors (3360964146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2457815646 is a wasteful number, since it uses less digits than its factorization.

2457815646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260457 (or 260446 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 48.

The square root of 2457815646 is about 49576.3617664709. The cubic root of 2457815646 is about 1349.5317344396.

The spelling of 2457815646 in words is "two billion, four hundred fifty-seven million, eight hundred fifteen thousand, six hundred forty-six".