1656161161660 has 12 divisors (see below), whose sum is σ = 3477938439528. Its totient is φ = 662464464656.

The previous prime is 1656161161619. The next prime is 1656161161661. The reversal of 1656161161660 is 661611616561.

It is a self number, because there is not a number n which added to its sum of digits gives 1656161161660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656161161661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41404029022 + ... + 41404029061.

It is an arithmetic number, because the mean of its divisors is an integer number (289828203294).

Almost surely, 2^{1656161161660} is an apocalyptic number.

1656161161660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656161161660 is an abundant number, since it is smaller than the sum of its proper divisors (1821777277868).

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

1656161161660 is a wasteful number, since it uses less digits than its factorization.

1656161161660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82808058092 (or 82808058090 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 1656161161660 in words is "one trillion, six hundred fifty-six billion, one hundred sixty-one million, one hundred sixty-one thousand, six hundred sixty".