15505666055 has 32 divisors (see below), whose sum is σ = 20786692608. Its totient is φ = 11005948800.

The previous prime is 15505666013. The next prime is 15505666079. The reversal of 15505666055 is 55066650551.

It is not a de Polignac number, because 15505666055 - 2¹² = 15505661959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15505665997 and 15505666015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5464097 + ... + 5466933.

It is an arithmetic number, because the mean of its divisors is an integer number (649584144).

Almost surely, 2^15505666055 is an apocalyptic number.

15505666055 is a deficient number, since it is larger than the sum of its proper divisors (5281026553).

15505666055 is a wasteful number, since it uses less digits than its factorization.

15505666055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 15505666055 in words is "fifteen billion, five hundred five million, six hundred sixty-six thousand, fifty-five".