55250305278 has 64 divisors (see below), whose sum is σ = 135338757120. Its totient is φ = 14691359232.

The previous prime is 55250305277. The next prime is 55250305321. The reversal of 55250305278 is 87250305255.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55250305277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737163 + ... + 808646.

It is an arithmetic number, because the mean of its divisors is an integer number (2114668080).

Almost surely, 2^55250305278 is an apocalyptic number.

55250305278 is an abundant number, since it is smaller than the sum of its proper divisors (80088451842).

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

55250305278 is a wasteful number, since it uses less digits than its factorization.

55250305278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545881.

The product of its (nonzero) digits is 420000, while the sum is 42.

The spelling of 55250305278 in words is "fifty-five billion, two hundred fifty million, three hundred five thousand, two hundred seventy-eight".