50550420400 has 60 divisors (see below), whose sum is σ = 122221087072. Its totient is φ = 20091352320.

The previous prime is 50550420391. The next prime is 50550420407. The reversal of 50550420400 is 402405505.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (50550420407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339672 + ... + 465271.

Almost surely, 2^50550420400 is an apocalyptic number.

50550420400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

50550420400 is an abundant number, since it is smaller than the sum of its proper divisors (71670666672).

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

50550420400 is a wasteful number, since it uses less digits than its factorization.

50550420400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805118 (or 805107 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

Adding to 50550420400 its reverse (402405505), we get a palindrome (50952825905).

The spelling of 50550420400 in words is "fifty billion, five hundred fifty million, four hundred twenty thousand, four hundred".