55505012500 has 72 divisors (see below), whose sum is σ = 138753869184. Its totient is φ = 19030260000.

The previous prime is 55505012491. The next prime is 55505012533. The reversal of 55505012500 is 521050555.

It is a happy number.

55505012500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229672 + ... + 404671.

It is an arithmetic number, because the mean of its divisors is an integer number (1927137072).

Almost surely, 2^55505012500 is an apocalyptic number.

55505012500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55505012500 is an abundant number, since it is smaller than the sum of its proper divisors (83248856684).

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

55505012500 is an equidigital number, since it uses as much as digits as its factorization.

55505012500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634379 (or 634357 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 28.

The spelling of 55505012500 in words is "fifty-five billion, five hundred five million, twelve thousand, five hundred".