2546740864 has 16 divisors (see below), whose sum is σ = 5073585570. Its totient is φ = 1273370368.

The previous prime is 2546740843. The next prime is 2546740873. The reversal of 2546740864 is 4680476452.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2097640000 + 449100864 = 45800^2 + 21192^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9948079 + ... + 9948334.

Almost surely, 2^2546740864 is an apocalyptic number.

It is an amenable number.

2546740864 is a deficient number, since it is larger than the sum of its proper divisors (2526844706).

2546740864 is an equidigital number, since it uses as much as digits as its factorization.

2546740864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19896427 (or 19896415 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 46.

The square root of 2546740864 is about 50465.2441190965. The cubic root of 2546740864 is about 1365.6149177457.

The spelling of 2546740864 in words is "two billion, five hundred forty-six million, seven hundred forty thousand, eight hundred sixty-four".