861153442092 has 36 divisors (see below), whose sum is σ = 2271448211760. Its totient is φ = 274570662432.

The previous prime is 861153442063. The next prime is 861153442117. The reversal of 861153442092 is 290244351168.

861153442092 is a `hidden beast` number, since 8 + 6 + 1 + 1 + 534 + 4 + 20 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 520019367 + ... + 520021022.

It is an arithmetic number, because the mean of its divisors is an integer number (63095783660).

Almost surely, 2^861153442092 is an apocalyptic number.

It is an amenable number.

861153442092 is an abundant number, since it is smaller than the sum of its proper divisors (1410294769668).

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

861153442092 is a wasteful number, since it uses less digits than its factorization.

861153442092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040040422 (or 1040040417 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 861153442092 in words is "eight hundred sixty-one billion, one hundred fifty-three million, four hundred forty-two thousand, ninety-two".