16161065505615 has 32 divisors (see below), whose sum is σ = 27479774969856. Its totient is φ = 8082286686720.

The previous prime is 16161065505601. The next prime is 16161065505623. The reversal of 16161065505615 is 51650556016161.

It is not a de Polignac number, because 16161065505615 - 2¹¹ = 16161065503567 is a prime.

It is a super-2 number, since 2×16161065505615² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116862127 + ... + 117000336.

It is an arithmetic number, because the mean of its divisors is an integer number (858742967808).

Almost surely, 2^{16161065505615} is an apocalyptic number.

16161065505615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16161065505615 is a deficient number, since it is larger than the sum of its proper divisors (11318709464241).

16161065505615 is a wasteful number, since it uses less digits than its factorization.

16161065505615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233862759.

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 16161065505615 in words is "sixteen trillion, one hundred sixty-one billion, sixty-five million, five hundred five thousand, six hundred fifteen".