2546400644 has 24 divisors (see below), whose sum is σ = 4491244800. Its totient is φ = 1263227840.

The previous prime is 2546400589. The next prime is 2546400671. The reversal of 2546400644 is 4460046452.

It is a super-2 number, since 2×2546400644² = 12968312479527229472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263897 + ... + 273375.

It is an arithmetic number, because the mean of its divisors is an integer number (187135200).

Almost surely, 2^2546400644 is an apocalyptic number.

It is an amenable number.

2546400644 is a deficient number, since it is larger than the sum of its proper divisors (1944844156).

2546400644 is a wasteful number, since it uses less digits than its factorization.

2546400644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003 (or 10001 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

The square root of 2546400644 is about 50461.8731717323. The cubic root of 2546400644 is about 1365.5541040466.

The spelling of 2546400644 in words is "two billion, five hundred forty-six million, four hundred thousand, six hundred forty-four".