55527780550 has 48 divisors (see below), whose sum is σ = 112723481664. Its totient is φ = 20182500000.

The previous prime is 55527780547. The next prime is 55527780559. The reversal of 55527780550 is 5508772555.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55527780494 and 55527780503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55527780559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1215625 + ... + 1260475.

It is an arithmetic number, because the mean of its divisors is an integer number (2348405868).

Almost surely, 2^55527780550 is an apocalyptic number.

55527780550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55527780550 is an abundant number, since it is smaller than the sum of its proper divisors (57195701114).

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

55527780550 is a wasteful number, since it uses less digits than its factorization.

55527780550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47125 (or 47120 counting only the distinct ones).

The product of its (nonzero) digits is 2450000, while the sum is 49.

The spelling of 55527780550 in words is "fifty-five billion, five hundred twenty-seven million, seven hundred eighty thousand, five hundred fifty".