1157556664 has 48 divisors (see below), whose sum is σ = 2416024800. Its totient is φ = 519467520.

The previous prime is 1157556661. The next prime is 1157556671. The reversal of 1157556664 is 4666557511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157556661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68904 + ... + 84040.

It is an arithmetic number, because the mean of its divisors is an integer number (50333850).

Almost surely, 2^1157556664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1157556664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208012400).

1157556664 is an abundant number, since it is smaller than the sum of its proper divisors (1258468136).

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

1157556664 is a wasteful number, since it uses less digits than its factorization.

1157556664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15244 (or 15229 counting only the distinct ones).

The product of its digits is 756000, while the sum is 46.

The square root of 1157556664 is about 34022.8844162279. The cubic root of 1157556664 is about 1049.9793386713.

The spelling of 1157556664 in words is "one billion, one hundred fifty-seven million, five hundred fifty-six thousand, six hundred sixty-four".