55525277780 has 24 divisors (see below), whose sum is σ = 133260667008. Its totient is φ = 19037238048.

The previous prime is 55525277749. The next prime is 55525277789. The reversal of 55525277780 is 8777252555.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55525277789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198304424 + ... + 198304703.

It is an arithmetic number, because the mean of its divisors is an integer number (5552527792).

Almost surely, 2^55525277780 is an apocalyptic number.

It is an amenable number.

55525277780 is an abundant number, since it is smaller than the sum of its proper divisors (77735389228).

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

55525277780 is a wasteful number, since it uses less digits than its factorization.

55525277780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396609143 (or 396609141 counting only the distinct ones).

The product of its (nonzero) digits is 6860000, while the sum is 53.

The spelling of 55525277780 in words is "fifty-five billion, five hundred twenty-five million, two hundred seventy-seven thousand, seven hundred eighty".