1163155550 has 48 divisors (see below), whose sum is σ = 2190824064. Its totient is φ = 459420000.

The previous prime is 1163155531. The next prime is 1163155573. The reversal of 1163155550 is 555513611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2036765 + ... + 2037335.

It is an arithmetic number, because the mean of its divisors is an integer number (45642168).

Almost surely, 2^1163155550 is an apocalyptic number.

1163155550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1163155550 is a deficient number, since it is larger than the sum of its proper divisors (1027668514).

1163155550 is a wasteful number, since it uses less digits than its factorization.

1163155550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 32.

The square root of 1163155550 is about 34105.0663391819. The cubic root of 1163155550 is about 1051.6694681502.

The spelling of 1163155550 in words is "one billion, one hundred sixty-three million, one hundred fifty-five thousand, five hundred fifty".