1157658081 has 16 divisors (see below), whose sum is σ = 1585129728. Its totient is φ = 751161600.

The previous prime is 1157657999. The next prime is 1157658091. The reversal of 1157658081 is 1808567511.

It is not a de Polignac number, because 1157658081 - 2⁷ = 1157657953 is a prime.

It is a super-2 number, since 2×1157658081² = 2680344465009205122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1157658091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2841 + ... + 48201.

It is an arithmetic number, because the mean of its divisors is an integer number (99070608).

Almost surely, 2^1157658081 is an apocalyptic number.

It is an amenable number.

1157658081 is a deficient number, since it is larger than the sum of its proper divisors (427471647).

1157658081 is a wasteful number, since it uses less digits than its factorization.

1157658081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45592.

The product of its (nonzero) digits is 67200, while the sum is 42.

The square root of 1157658081 is about 34024.3748068940. The cubic root of 1157658081 is about 1050.0100017188.

The spelling of 1157658081 in words is "one billion, one hundred fifty-seven million, six hundred fifty-eight thousand, eighty-one".