161151165650 has 12 divisors (see below), whose sum is σ = 299741168202. Its totient is φ = 64460466240.

The previous prime is 161151165613. The next prime is 161151165671. The reversal of 161151165650 is 56561151161.

It is a happy number.

161151165650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 70104741529 + 91046424121 = 264773^2 + 301739^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1611511607 + ... + 1611511706.

Almost surely, 2^161151165650 is an apocalyptic number.

161151165650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161151165650 is a deficient number, since it is larger than the sum of its proper divisors (138590002552).

161151165650 is a wasteful number, since it uses less digits than its factorization.

161151165650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223023325 (or 3223023320 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 161151165650 in words is "one hundred sixty-one billion, one hundred fifty-one million, one hundred sixty-five thousand, six hundred fifty".