1657652961 has 4 divisors (see below), whose sum is σ = 2210203952. Its totient is φ = 1105101972.

The previous prime is 1657652959. The next prime is 1657652993. The reversal of 1657652961 is 1692567561.

1657652961 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1657652961 - 2¹ = 1657652959 is a prime.

It is a super-2 number, since 2×1657652961² = 5495626678224135042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1657652961.

It is not an unprimeable number, because it can be changed into a prime (1657652921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276275491 + ... + 276275496.

It is an arithmetic number, because the mean of its divisors is an integer number (552550988).

Almost surely, 2^1657652961 is an apocalyptic number.

It is an amenable number.

1657652961 is a deficient number, since it is larger than the sum of its proper divisors (552550991).

1657652961 is an equidigital number, since it uses as much as digits as its factorization.

1657652961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552550990.

The product of its digits is 680400, while the sum is 48.

The square root of 1657652961 is about 40714.2844834586. The cubic root of 1657652961 is about 1183.4898507685.

The spelling of 1657652961 in words is "one billion, six hundred fifty-seven million, six hundred fifty-two thousand, nine hundred sixty-one".