16061561601015 has 32 divisors (see below), whose sum is σ = 29581005565440. Its totient is φ = 7289604929664.

The previous prime is 16061561600993. The next prime is 16061561601061. The reversal of 16061561601015 is 51010616516061.

It is not a de Polignac number, because 16061561601015 - 2⁹ = 16061561600503 is a prime.

It is a super-2 number, since 2×16061561601015² (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 (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550227324 + ... + 550256513.

It is an arithmetic number, because the mean of its divisors is an integer number (924406423920).

Almost surely, 2^{16061561601015} is an apocalyptic number.

16061561601015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16061561601015 is a deficient number, since it is larger than the sum of its proper divisors (13519443964425).

16061561601015 is a wasteful number, since it uses less digits than its factorization.

16061561601015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100483991.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 16061561601015 in words is "sixteen trillion, sixty-one billion, five hundred sixty-one million, six hundred one thousand, fifteen".