1157166263831 has 4 divisors (see below), whose sum is σ = 1157343505200. Its totient is φ = 1156989022464.

The previous prime is 1157166263809. The next prime is 1157166263833. The reversal of 1157166263831 is 1383626617511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157166263831 is a prime.

It is a super-2 number, since 2×1157166263831² (a number of 25 digits) 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 1157166263831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157166263833) 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, 88610891 + ... + 88623948.

It is an arithmetic number, because the mean of its divisors is an integer number (289335876300).

Almost surely, 2^{1157166263831} is an apocalyptic number.

1157166263831 is a deficient number, since it is larger than the sum of its proper divisors (177241369).

1157166263831 is an equidigital number, since it uses as much as digits as its factorization.

1157166263831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177241368.

The product of its digits is 1088640, while the sum is 50.

The spelling of 1157166263831 in words is "one trillion, one hundred fifty-seven billion, one hundred sixty-six million, two hundred sixty-three thousand, eight hundred thirty-one".