15161001121566 has 32 divisors (see below), whose sum is σ = 33742083597600. Its totient is φ = 5046021541440.

The previous prime is 15161001121547. The next prime is 15161001121571. The reversal of 15161001121566 is 66512110016151.

15161001121566 is a `hidden beast` number, since 1 + 5 + 1 + 61 + 0 + 0 + 11 + 21 + 566 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15161001121566.

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 15 ways as a sum of consecutive naturals, for example, 212338951 + ... + 212410338.

It is an arithmetic number, because the mean of its divisors is an integer number (1054440112425).

Almost surely, 2^{15161001121566} is an apocalyptic number.

15161001121566 is an abundant number, since it is smaller than the sum of its proper divisors (18581082476034).

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

15161001121566 is a wasteful number, since it uses less digits than its factorization.

15161001121566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424749961 (or 424749955 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

The spelling of 15161001121566 in words is "fifteen trillion, one hundred sixty-one billion, one million, one hundred twenty-one thousand, five hundred sixty-six".