1157556663 has 40 divisors (see below), whose sum is σ = 1799463600. Its totient is φ = 740662272.

The previous prime is 1157556661. The next prime is 1157556671. The reversal of 1157556663 is 3666557511.

It is not a de Polignac number, because 1157556663 - 2¹ = 1157556661 is a prime.

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 39 ways as a sum of consecutive naturals, for example, 419095 + ... + 421847.

It is an arithmetic number, because the mean of its divisors is an integer number (44986590).

Almost surely, 2^1157556663 is an apocalyptic number.

1157556663 is a deficient number, since it is larger than the sum of its proper divisors (641906937).

1157556663 is a wasteful number, since it uses less digits than its factorization.

1157556663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973 (or 2964 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 1157556663 is about 34022.8844015319. The cubic root of 1157556663 is about 1049.9793383689.

The spelling of 1157556663 in words is "one billion, one hundred fifty-seven million, five hundred fifty-six thousand, six hundred sixty-three".