1156526660 has 24 divisors (see below), whose sum is σ = 2571571800. Its totient is φ = 435398144.

The previous prime is 1156526653. The next prime is 1156526671. The reversal of 1156526660 is 666256511.

It can be written as a sum of positive squares in 4 ways, for example, as 623101444 + 533425216 = 24962^2 + 23096^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700435 + ... + 1701114.

It is an arithmetic number, because the mean of its divisors is an integer number (107148825).

Almost surely, 2^1156526660 is an apocalyptic number.

1156526660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156526660 is an abundant number, since it is smaller than the sum of its proper divisors (1415045140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156526660 is a wasteful number, since it uses less digits than its factorization.

1156526660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401575 (or 3401573 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 1156526660 is about 34007.7441180682. The cubic root of 1156526660 is about 1049.6678193358.

The spelling of 1156526660 in words is "one billion, one hundred fifty-six million, five hundred twenty-six thousand, six hundred sixty".