55242715500 has 768 divisors, whose sum is σ = 218738257920. Its totient is φ = 11750400000.

The previous prime is 55242715487. The next prime is 55242715501. The reversal of 55242715500 is 551724255.

55242715500 is a `hidden beast` number, since 552 + 42 + 7 + 15 + 50 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (55242715501) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 220090375 + ... + 220090625.

It is an arithmetic number, because the mean of its divisors is an integer number (284815440).

Almost surely, 2^55242715500 is an apocalyptic number.

55242715500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55242715500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109369128960).

55242715500 is an abundant number, since it is smaller than the sum of its proper divisors (163495542420).

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

55242715500 is a wasteful number, since it uses less digits than its factorization.

55242715500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 36.

The spelling of 55242715500 in words is "fifty-five billion, two hundred forty-two million, seven hundred fifteen thousand, five hundred".