55578280050 has 36 divisors (see below), whose sum is σ = 149320313610. Its totient is φ = 14820874560.

The previous prime is 55578280039. The next prime is 55578280061. The reversal of 55578280050 is 5008287555.

55578280050 is a `hidden beast` number, since 5 + 5 + 578 + 28 + 0 + 0 + 50 = 666.

It is an interprime number because it is at equal distance from previous prime (55578280039) and next prime (55578280061).

It can be written as a sum of positive squares in 3 ways, for example, as 49736582289 + 5841697761 = 223017^2 + 76431^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 55578279978 and 55578280005.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 61753195 + ... + 61754094.

Almost surely, 2^55578280050 is an apocalyptic number.

55578280050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55578280050 is an abundant number, since it is smaller than the sum of its proper divisors (93742033560).

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

55578280050 is a wasteful number, since it uses less digits than its factorization.

55578280050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123507307 (or 123507299 counting only the distinct ones).

The product of its (nonzero) digits is 560000, while the sum is 45.

The spelling of 55578280050 in words is "fifty-five billion, five hundred seventy-eight million, two hundred eighty thousand, fifty".