1161651586428 has 36 divisors (see below), whose sum is σ = 2956104442200. Its totient is φ = 384618420576.

The previous prime is 1161651586427. The next prime is 1161651586499. The reversal of 1161651586428 is 8246851561611.

It is a happy number.

1161651586428 is a `hidden beast` number, since 1 + 1 + 6 + 1 + 6 + 51 + 586 + 4 + 2 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161651586427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108276850 + ... + 108287577.

Almost surely, 2^{1161651586428} is an apocalyptic number.

1161651586428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1161651586428 is an abundant number, since it is smaller than the sum of its proper divisors (1794452855772).

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

1161651586428 is a wasteful number, since it uses less digits than its factorization.

1161651586428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216564586 (or 216564581 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The spelling of 1161651586428 in words is "one trillion, one hundred sixty-one billion, six hundred fifty-one million, five hundred eighty-six thousand, four hundred twenty-eight".