165561151101610 has 16 divisors (see below), whose sum is σ = 325101896708832. Its totient is φ = 60204054946000.

The previous prime is 165561151101589. The next prime is 165561151101659. The reversal of 165561151101610 is 16101151165561.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752550686716 + ... + 752550686935.

It is an arithmetic number, because the mean of its divisors is an integer number (20318868544302).

Almost surely, 2^{165561151101610} is an apocalyptic number.

165561151101610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165561151101610 is a deficient number, since it is larger than the sum of its proper divisors (159540745607222).

165561151101610 is a wasteful number, since it uses less digits than its factorization.

165561151101610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505101373669.

The product of its (nonzero) digits is 27000, while the sum is 40.

The spelling of 165561151101610 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, one hundred fifty-one million, one hundred one thousand, six hundred ten".