55619794639 has 4 divisors (see below), whose sum is σ = 55620277024. Its totient is φ = 55619312256.

The previous prime is 55619794627. The next prime is 55619794673. The reversal of 55619794639 is 93649791655.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55619794639 - 2²⁵ = 55586240207 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 (55619794679) 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, 44794 + ... + 336520.

It is an arithmetic number, because the mean of its divisors is an integer number (13905069256).

Almost surely, 2^55619794639 is an apocalyptic number.

55619794639 is a deficient number, since it is larger than the sum of its proper divisors (482385).

55619794639 is a wasteful number, since it uses less digits than its factorization.

55619794639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482384.

The product of its digits is 55112400, while the sum is 64.

The spelling of 55619794639 in words is "fifty-five billion, six hundred nineteen million, seven hundred ninety-four thousand, six hundred thirty-nine".