1161101856 has 48 divisors (see below), whose sum is σ = 3208312800. Its totient is φ = 366663168.

The previous prime is 1161101839. The next prime is 1161101873. The reversal of 1161101856 is 6581011611.

It is an interprime number because it is at equal distance from previous prime (1161101839) and next prime (1161101873).

It is a tau number, because it is divible by the number of its divisors (48).

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, 316461 + ... + 320108.

It is an arithmetic number, because the mean of its divisors is an integer number (66839850).

Almost surely, 2^1161101856 is an apocalyptic number.

1161101856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1161101856 is an abundant number, since it is smaller than the sum of its proper divisors (2047210944).

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

1161101856 is a wasteful number, since it uses less digits than its factorization.

1161101856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636601 (or 636593 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 1161101856 is about 34074.9446954797. The cubic root of 1161101856 is about 1051.0501529720.

The spelling of 1161101856 in words is "one billion, one hundred sixty-one million, one hundred one thousand, eight hundred fifty-six".