15551660601 has 24 divisors (see below), whose sum is σ = 23224581120. Its totient is φ = 10017561600.

The previous prime is 15551660581. The next prime is 15551660623. The reversal of 15551660601 is 10606615551.

It is not a de Polignac number, because 15551660601 - 2¹¹ = 15551658553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15551660101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135360 + ... + 222318.

It is an arithmetic number, because the mean of its divisors is an integer number (967690880).

Almost surely, 2^15551660601 is an apocalyptic number.

It is an amenable number.

15551660601 is a deficient number, since it is larger than the sum of its proper divisors (7672920519).

15551660601 is a wasteful number, since it uses less digits than its factorization.

15551660601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87637 (or 87634 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 15551660601 in words is "fifteen billion, five hundred fifty-one million, six hundred sixty thousand, six hundred one".