2161461604136 has 16 divisors (see below), whose sum is σ = 4053675029940. Its totient is φ = 1080481596160.

The previous prime is 2161461604123. The next prime is 2161461604163. The reversal of 2161461604136 is 6314061641612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1333780151236 + 827681452900 = 1154894^2 + 909770^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2161461604093 and 2161461604102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31113875 + ... + 31183266.

Almost surely, 2^{2161461604136} is an apocalyptic number.

It is an amenable number.

2161461604136 is a deficient number, since it is larger than the sum of its proper divisors (1892213425804).

2161461604136 is a wasteful number, since it uses less digits than its factorization.

2161461604136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62301484 (or 62301480 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 2161461604136 in words is "two trillion, one hundred sixty-one billion, four hundred sixty-one million, six hundred four thousand, one hundred thirty-six".