2161561070662 has 24 divisors (see below), whose sum is σ = 3824826097680. Its totient is φ = 913335660720.

The previous prime is 2161561070611. The next prime is 2161561070681. The reversal of 2161561070662 is 2660701651612.

It is a congruent number.

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, 155322237 + ... + 155336152.

It is an arithmetic number, because the mean of its divisors is an integer number (159367754070).

Almost surely, 2^{2161561070662} is an apocalyptic number.

2161561070662 is a deficient number, since it is larger than the sum of its proper divisors (1663265027018).

2161561070662 is a wasteful number, since it uses less digits than its factorization.

2161561070662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310658476 (or 310658469 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 2161561070662 in words is "two trillion, one hundred sixty-one billion, five hundred sixty-one million, seventy thousand, six hundred sixty-two".