1165561650534 has 16 divisors (see below), whose sum is σ = 2331180977472. Its totient is φ = 388510937448.

The previous prime is 1165561650521. The next prime is 1165561650553. The reversal of 1165561650534 is 4350561655611.

It is a happy number.

It is a super-2 number, since 2×1165561650534² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 2138224 + ... + 2627379.

It is an arithmetic number, because the mean of its divisors is an integer number (145698811092).

Almost surely, 2^{1165561650534} is an apocalyptic number.

1165561650534 is an abundant number, since it is smaller than the sum of its proper divisors (1165619326938).

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

1165561650534 is a wasteful number, since it uses less digits than its factorization.

1165561650534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806371.

The product of its (nonzero) digits is 1620000, while the sum is 48.

The spelling of 1165561650534 in words is "one trillion, one hundred sixty-five billion, five hundred sixty-one million, six hundred fifty thousand, five hundred thirty-four".