1151655720 has 32 divisors (see below), whose sum is σ = 3454967520. Its totient is φ = 307108160.

The previous prime is 1151655719. The next prime is 1151655737. The reversal of 1151655720 is 275561511.

It is a happy number.

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, 4798446 + ... + 4798685.

It is an arithmetic number, because the mean of its divisors is an integer number (107967735).

Almost surely, 2^1151655720 is an apocalyptic number.

1151655720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151655720 is an abundant number, since it is smaller than the sum of its proper divisors (2303311800).

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

1151655720 is a wasteful number, since it uses less digits than its factorization.

1151655720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9597145 (or 9597141 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 33.

The square root of 1151655720 is about 33936.0533945832. The cubic root of 1151655720 is about 1048.1921180141.

The spelling of 1151655720 in words is "one billion, one hundred fifty-one million, six hundred fifty-five thousand, seven hundred twenty".