55121200615 has 16 divisors (see below), whose sum is σ = 71324130528. Its totient is φ = 40653127296.

The previous prime is 55121200613. The next prime is 55121200649. The reversal of 55121200615 is 51600212155.

It is a cyclic number.

It is not a de Polignac number, because 55121200615 - 2¹ = 55121200613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121200613) 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, 487612 + ... + 589921.

It is an arithmetic number, because the mean of its divisors is an integer number (4457758158).

Almost surely, 2^55121200615 is an apocalyptic number.

55121200615 is a deficient number, since it is larger than the sum of its proper divisors (16202929913).

55121200615 is a wasteful number, since it uses less digits than its factorization.

55121200615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078338.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 55121200615 in words is "fifty-five billion, one hundred twenty-one million, two hundred thousand, six hundred fifteen".