1187166156 has 48 divisors (see below), whose sum is σ = 3126090240. Its totient is φ = 347341120.

The previous prime is 1187166109. The next prime is 1187166179. The reversal of 1187166156 is 6516617811.

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, 151236 + ... + 158891.

It is an arithmetic number, because the mean of its divisors is an integer number (65126880).

Almost surely, 2^1187166156 is an apocalyptic number.

It is an amenable number.

1187166156 is an abundant number, since it is smaller than the sum of its proper divisors (1938924084).

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

1187166156 is a wasteful number, since it uses less digits than its factorization.

1187166156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310174 (or 310172 counting only the distinct ones).

The product of its digits is 60480, while the sum is 42.

The square root of 1187166156 is about 34455.2776218680. The cubic root of 1187166156 is about 1058.8566513742.

The spelling of 1187166156 in words is "one billion, one hundred eighty-seven million, one hundred sixty-six thousand, one hundred fifty-six".