1161205563402 has 24 divisors (see below), whose sum is σ = 2583943912836. Its totient is φ = 376607209536.

The previous prime is 1161205563391. The next prime is 1161205563481. The reversal of 1161205563402 is 2043655021611.

1161205563402 is a `hidden beast` number, since 1 + 1 + 6 + 12 + 0 + 5 + 5 + 634 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1143656997561 + 17548565841 = 1069419^2 + 132471^2 .

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, 871775283 + ... + 871776614.

Almost surely, 2^{1161205563402} is an apocalyptic number.

1161205563402 is an abundant number, since it is smaller than the sum of its proper divisors (1422738349434).

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

1161205563402 is a wasteful number, since it uses less digits than its factorization.

1161205563402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743551942 (or 1743551939 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 1161205563402 in words is "one trillion, one hundred sixty-one billion, two hundred five million, five hundred sixty-three thousand, four hundred two".