10161541665 has 64 divisors (see below), whose sum is σ = 20866533120. Its totient is φ = 4636984320.

The previous prime is 10161541651. The next prime is 10161541777. The reversal of 10161541665 is 56614516101.

10161541665 is a `hidden beast` number, since 101 + 6 + 1 + 541 + 6 + 6 + 5 = 666.

It is not a de Polignac number, because 10161541665 - 2⁵ = 10161541633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 176014 + ... + 226503.

It is an arithmetic number, because the mean of its divisors is an integer number (326039580).

Almost surely, 2^10161541665 is an apocalyptic number.

10161541665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10161541665 is an abundant number, since it is smaller than the sum of its proper divisors (10704991455).

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

10161541665 is a wasteful number, since it uses less digits than its factorization.

10161541665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402559 (or 402553 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 10161541665 in words is "ten billion, one hundred sixty-one million, five hundred forty-one thousand, six hundred sixty-five".