1634640456 has 16 divisors (see below), whose sum is σ = 4086601200. Its totient is φ = 544880144.

The previous prime is 1634640443. The next prime is 1634640463. The reversal of 1634640456 is 6540464361.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34054986 + ... + 34055033.

It is an arithmetic number, because the mean of its divisors is an integer number (255412575).

Almost surely, 2^1634640456 is an apocalyptic number.

It is an amenable number.

1634640456 is an abundant number, since it is smaller than the sum of its proper divisors (2451960744).

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

1634640456 is a wasteful number, since it uses less digits than its factorization.

1634640456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68110028 (or 68110024 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 1634640456 is about 40430.6870582235. The cubic root of 1634640456 is about 1177.9876781418.

The spelling of 1634640456 in words is "one billion, six hundred thirty-four million, six hundred forty thousand, four hundred fifty-six".