1157718723 has 16 divisors (see below), whose sum is σ = 1765128960. Its totient is φ = 661183776.

The previous prime is 1157718721. The next prime is 1157718733. The reversal of 1157718723 is 3278177511.

It is not a de Polignac number, because 1157718723 - 2¹ = 1157718721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1157718721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25593 + ... + 54501.

It is an arithmetic number, because the mean of its divisors is an integer number (110320560).

Almost surely, 2^1157718723 is an apocalyptic number.

1157718723 is a deficient number, since it is larger than the sum of its proper divisors (607410237).

1157718723 is a wasteful number, since it uses less digits than its factorization.

1157718723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30826.

The product of its digits is 82320, while the sum is 42.

The square root of 1157718723 is about 34025.2659504669. The cubic root of 1157718723 is about 1050.0283357432.

The spelling of 1157718723 in words is "one billion, one hundred fifty-seven million, seven hundred eighteen thousand, seven hundred twenty-three".