1001161515165 has 64 divisors (see below), whose sum is σ = 1835866944000. Its totient is φ = 456382808064.

The previous prime is 1001161515163. The next prime is 1001161515169. The reversal of 1001161515165 is 5615151611001.

It is not a de Polignac number, because 1001161515165 - 2¹ = 1001161515163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001161515163) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55460061 + ... + 55478109.

It is an arithmetic number, because the mean of its divisors is an integer number (28685421000).

Almost surely, 2^{1001161515165} is an apocalyptic number.

1001161515165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001161515165 is a deficient number, since it is larger than the sum of its proper divisors (834705428835).

1001161515165 is a wasteful number, since it uses less digits than its factorization.

1001161515165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19526.

The product of its (nonzero) digits is 4500, while the sum is 33.

The spelling of 1001161515165 in words is "one trillion, one billion, one hundred sixty-one million, five hundred fifteen thousand, one hundred sixty-five".