55765798643 has 4 divisors (see below), whose sum is σ = 58190398608. Its totient is φ = 53341198680.

The previous prime is 55765798633. The next prime is 55765798687. The reversal of 55765798643 is 34689756755.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55765798643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55765798643.

It is not an unprimeable number, because it can be changed into a prime (55765798633) 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, 1212299948 + ... + 1212299993.

It is an arithmetic number, because the mean of its divisors is an integer number (14547599652).

Almost surely, 2^55765798643 is an apocalyptic number.

55765798643 is a deficient number, since it is larger than the sum of its proper divisors (2424599965).

55765798643 is a wasteful number, since it uses less digits than its factorization.

55765798643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424599964.

The product of its digits is 190512000, while the sum is 65.

The spelling of 55765798643 in words is "fifty-five billion, seven hundred sixty-five million, seven hundred ninety-eight thousand, six hundred forty-three".