55146788513 has 4 divisors (see below), whose sum is σ = 57048401940. Its totient is φ = 53245175088.

The previous prime is 55146788509. The next prime is 55146788549. The reversal of 55146788513 is 31588764155.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15648008464 + 39498780049 = 125092^2 + 198743^2 .

It is a cyclic number.

It is not a de Polignac number, because 55146788513 - 2² = 55146788509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55146788573) 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, 950806670 + ... + 950806727.

It is an arithmetic number, because the mean of its divisors is an integer number (14262100485).

Almost surely, 2^55146788513 is an apocalyptic number.

It is an amenable number.

55146788513 is a deficient number, since it is larger than the sum of its proper divisors (1901613427).

55146788513 is a wasteful number, since it uses less digits than its factorization.

55146788513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901613426.

The product of its digits is 4032000, while the sum is 53.

The spelling of 55146788513 in words is "fifty-five billion, one hundred forty-six million, seven hundred eighty-eight thousand, five hundred thirteen".