1158664657 has 4 divisors (see below), whose sum is σ = 1189979956. Its totient is φ = 1127349360.

The previous prime is 1158664651. The next prime is 1158664667. The reversal of 1158664657 is 7564668511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1119839296 + 38825361 = 33464^2 + 6231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1158664657 is a prime.

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 1158664657.

It is not an unprimeable number, because it can be changed into a prime (1158664651) 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, 15657594 + ... + 15657667.

It is an arithmetic number, because the mean of its divisors is an integer number (297494989).

Almost surely, 2^1158664657 is an apocalyptic number.

It is an amenable number.

1158664657 is a deficient number, since it is larger than the sum of its proper divisors (31315299).

1158664657 is an equidigital number, since it uses as much as digits as its factorization.

1158664657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31315298.

The product of its digits is 1209600, while the sum is 49.

The square root of 1158664657 is about 34039.1635766803. The cubic root of 1158664657 is about 1050.3142391288.

The spelling of 1158664657 in words is "one billion, one hundred fifty-eight million, six hundred sixty-four thousand, six hundred fifty-seven".