1161153660 has 48 divisors (see below), whose sum is σ = 3265466400. Its totient is φ = 308285184.

The previous prime is 1161153629. The next prime is 1161153731. The reversal of 1161153660 is 663511611.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28515 + ... + 55994.

It is an arithmetic number, because the mean of its divisors is an integer number (68030550).

Almost surely, 2^1161153660 is an apocalyptic number.

1161153660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161153660 is an abundant number, since it is smaller than the sum of its proper divisors (2104312740).

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

1161153660 is a wasteful number, since it uses less digits than its factorization.

1161153660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84750 (or 84748 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1161153660 is about 34075.7048349700. The cubic root of 1161153660 is about 1051.0657840418.

The spelling of 1161153660 in words is "one billion, one hundred sixty-one million, one hundred fifty-three thousand, six hundred sixty".