15505566651064 has 48 divisors (see below), whose sum is σ = 33822468163080. Its totient is φ = 6644667395520.

The previous prime is 15505566651053. The next prime is 15505566651089. The reversal of 15505566651064 is 46015666550551.

15505566651064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15505566650996 and 15505566651014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2835234 + ... + 6248974.

Almost surely, 2^{15505566651064} is an apocalyptic number.

15505566651064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

15505566651064 is an abundant number, since it is smaller than the sum of its proper divisors (18316901512016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15505566651064 is a wasteful number, since it uses less digits than its factorization.

15505566651064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425348 (or 3425337 counting only the distinct ones).

The product of its (nonzero) digits is 16200000, while the sum is 55.

The spelling of 15505566651064 in words is "fifteen trillion, five hundred five billion, five hundred sixty-six million, six hundred fifty-one thousand, sixty-four".