5125555644 has 36 divisors (see below), whose sum is σ = 13145712552. Its totient is φ = 1553198240.

The previous prime is 5125555621. The next prime is 5125555693. The reversal of 5125555644 is 4465555215.

It is a junction number, because it is equal to n+sod(n) for n = 5125555596 and 5125555605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1763547 + ... + 1766450.

It is an arithmetic number, because the mean of its divisors is an integer number (365158682).

Almost surely, 2^5125555644 is an apocalyptic number.

It is an amenable number.

5125555644 is an abundant number, since it is smaller than the sum of its proper divisors (8020156908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5125555644 is a wasteful number, since it uses less digits than its factorization.

5125555644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3530026 (or 3530013 counting only the distinct ones).

The product of its digits is 600000, while the sum is 42.

The square root of 5125555644 is about 71592.9859972330. The cubic root of 5125555644 is about 1724.1709262721.

The spelling of 5125555644 in words is "five billion, one hundred twenty-five million, five hundred fifty-five thousand, six hundred forty-four".