16161520001 has 24 divisors (see below), whose sum is σ = 18073359360. Its totient is φ = 14438904480.

The previous prime is 16161519989. The next prime is 16161520003. The reversal of 16161520001 is 10002516161.

It is not a de Polignac number, because 16161520001 - 2¹⁸ = 16161257857 is a prime.

It is a super-2 number, since 2×16161520001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16161520003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1639355 + ... + 1649183.

It is an arithmetic number, because the mean of its divisors is an integer number (753056640).

Almost surely, 2^16161520001 is an apocalyptic number.

16161520001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16161520001 is a deficient number, since it is larger than the sum of its proper divisors (1911839359).

16161520001 is a wasteful number, since it uses less digits than its factorization.

16161520001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10085 (or 10074 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 16161520001 in words is "sixteen billion, one hundred sixty-one million, five hundred twenty thousand, one".