1151658561 has 8 divisors (see below), whose sum is σ = 1540185184. Its totient is φ = 765452160.

The previous prime is 1151658539. The next prime is 1151658569. The reversal of 1151658561 is 1658561511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1151658561 - 2⁷ = 1151658433 is a prime.

It is a super-2 number, since 2×1151658561² = 2652634882249181442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151658569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578896 + ... + 580881.

It is an arithmetic number, because the mean of its divisors is an integer number (192523148).

Almost surely, 2^1151658561 is an apocalyptic number.

It is an amenable number.

1151658561 is a deficient number, since it is larger than the sum of its proper divisors (388526623).

1151658561 is a wasteful number, since it uses less digits than its factorization.

1151658561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160111.

The product of its digits is 36000, while the sum is 39.

The square root of 1151658561 is about 33936.0952526952. The cubic root of 1151658561 is about 1048.1929799358.

The spelling of 1151658561 in words is "one billion, one hundred fifty-one million, six hundred fifty-eight thousand, five hundred sixty-one".