51777199550 has 48 divisors (see below), whose sum is σ = 97933203600. Its totient is φ = 20361196800.

The previous prime is 51777199549. The next prime is 51777199559. The reversal of 51777199550 is 5599177715.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51777199559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9937346 + ... + 9942554.

It is an arithmetic number, because the mean of its divisors is an integer number (2040275075).

Almost surely, 2^51777199550 is an apocalyptic number.

51777199550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51777199550 is a deficient number, since it is larger than the sum of its proper divisors (46156004050).

51777199550 is a wasteful number, since it uses less digits than its factorization.

51777199550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8541 (or 8536 counting only the distinct ones).

The product of its (nonzero) digits is 3472875, while the sum is 56.

The spelling of 51777199550 in words is "fifty-one billion, seven hundred seventy-seven million, one hundred ninety-nine thousand, five hundred fifty".