15616502151661 has 8 divisors (see below), whose sum is σ = 15636238201664. Its totient is φ = 15596777992320.

The previous prime is 15616502151631. The next prime is 15616502151667. The reversal of 15616502151661 is 16615120561651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15616502151661 - 2⁷ = 15616502151533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15616502151667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342855 + ... + 5599156.

It is an arithmetic number, because the mean of its divisors is an integer number (1954529775208).

Almost surely, 2^{15616502151661} is an apocalyptic number.

It is an amenable number.

15616502151661 is a deficient number, since it is larger than the sum of its proper divisors (19736050003).

15616502151661 is a wasteful number, since it uses less digits than its factorization.

15616502151661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945331.

The product of its (nonzero) digits is 324000, while the sum is 46.

The spelling of 15616502151661 in words is "fifteen trillion, six hundred sixteen billion, five hundred two million, one hundred fifty-one thousand, six hundred sixty-one".