15516550551651 has 16 divisors (see below), whose sum is σ = 20713293748224. Its totient is φ = 10332087877184.

The previous prime is 15516550551641. The next prime is 15516550551703. The reversal of 15516550551651 is 15615505561551.

It is a cyclic number.

It is not a de Polignac number, because 15516550551651 - 2²¹ = 15516548454499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15516550551594 and 15516550551603.

It is not an unprimeable number, because it can be changed into a prime (15516550551611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129615415 + ... + 129735071.

It is an arithmetic number, because the mean of its divisors is an integer number (1294580859264).

Almost surely, 2^{15516550551651} is an apocalyptic number.

15516550551651 is a deficient number, since it is larger than the sum of its proper divisors (5196743196573).

15516550551651 is a wasteful number, since it uses less digits than its factorization.

15516550551651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170610.

The product of its (nonzero) digits is 2812500, while the sum is 51.

The spelling of 15516550551651 in words is "fifteen trillion, five hundred sixteen billion, five hundred fifty million, five hundred fifty-one thousand, six hundred fifty-one".