15544971955 has 16 divisors (see below), whose sum is σ = 19755503424. Its totient is φ = 11701934080.

The previous prime is 15544971941. The next prime is 15544971997. The reversal of 15544971955 is 55917944551.

It is not a de Polignac number, because 15544971955 - 2¹⁵ = 15544939187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15544971896 and 15544971905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441450 + ... + 475360.

It is an arithmetic number, because the mean of its divisors is an integer number (1234718964).

Almost surely, 2^15544971955 is an apocalyptic number.

15544971955 is a deficient number, since it is larger than the sum of its proper divisors (4210531469).

15544971955 is a wasteful number, since it uses less digits than its factorization.

15544971955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39326.

The product of its digits is 5670000, while the sum is 55.

The spelling of 15544971955 in words is "fifteen billion, five hundred forty-four million, nine hundred seventy-one thousand, nine hundred fifty-five".