1657563640896 has 28 divisors (see below), whose sum is σ = 4385637133712. Its totient is φ = 552521213568.

The previous prime is 1657563640879. The next prime is 1657563640963. The reversal of 1657563640896 is 6980463657561.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4316571790 + ... + 4316572173.

Almost surely, 2^{1657563640896} is an apocalyptic number.

1657563640896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1657563640896 is an abundant number, since it is smaller than the sum of its proper divisors (2728073492816).

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

1657563640896 is an equidigital number, since it uses as much as digits as its factorization.

1657563640896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8633143978 (or 8633143968 counting only the distinct ones).

The product of its (nonzero) digits is 195955200, while the sum is 66.

The spelling of 1657563640896 in words is "one trillion, six hundred fifty-seven billion, five hundred sixty-three million, six hundred forty thousand, eight hundred ninety-six".