1161629813891 has 16 divisors (see below), whose sum is σ = 1273419584640. Its totient is φ = 1054730772480.

The previous prime is 1161629813881. The next prime is 1161629813899. The reversal of 1161629813891 is 1983189261611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161629813891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161629813899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368075 + ... + 1568036.

It is an arithmetic number, because the mean of its divisors is an integer number (79588724040).

Almost surely, 2^{1161629813891} is an apocalyptic number.

1161629813891 is a deficient number, since it is larger than the sum of its proper divisors (111789770749).

1161629813891 is a wasteful number, since it uses less digits than its factorization.

1161629813891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937374.

The product of its digits is 1119744, while the sum is 56.

The spelling of 1161629813891 in words is "one trillion, one hundred sixty-one billion, six hundred twenty-nine million, eight hundred thirteen thousand, eight hundred ninety-one".