55012621915 has 4 divisors (see below), whose sum is σ = 66015146304. Its totient is φ = 44010097528.

The previous prime is 55012621913. The next prime is 55012621933. The reversal of 55012621915 is 51912621055.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55012621915 - 2¹ = 55012621913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55012621913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5501262187 + ... + 5501262196.

It is an arithmetic number, because the mean of its divisors is an integer number (16503786576).

Almost surely, 2^55012621915 is an apocalyptic number.

55012621915 is a deficient number, since it is larger than the sum of its proper divisors (11002524389).

55012621915 is a wasteful number, since it uses less digits than its factorization.

55012621915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11002524388.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 55012621915 in words is "fifty-five billion, twelve million, six hundred twenty-one thousand, nine hundred fifteen".