55209208915 has 8 divisors (see below), whose sum is σ = 75715486560. Its totient is φ = 37857743232.

The previous prime is 55209208849. The next prime is 55209208921. The reversal of 55209208915 is 51980290255.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55209208915 - 2¹³ = 55209200723 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 788702950 + ... + 788703019.

It is an arithmetic number, because the mean of its divisors is an integer number (9464435820).

Almost surely, 2^55209208915 is an apocalyptic number.

55209208915 is a deficient number, since it is larger than the sum of its proper divisors (20506277645).

55209208915 is a wasteful number, since it uses less digits than its factorization.

55209208915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577405981.

The product of its (nonzero) digits is 324000, while the sum is 46.

The spelling of 55209208915 in words is "fifty-five billion, two hundred nine million, two hundred eight thousand, nine hundred fifteen".