51777568 has 12 divisors (see below), whose sum is σ = 101937150. Its totient is φ = 25888768.

The previous prime is 51777553. The next prime is 51777569. The reversal of 51777568 is 86577715.

It can be written as a sum of positive squares in only one way, i.e., 51667344 + 110224 = 7188^2 + 332^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51777569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808993 + ... + 809056.

Almost surely, 2^51777568 is an apocalyptic number.

It is an amenable number.

51777568 is a deficient number, since it is larger than the sum of its proper divisors (50159582).

51777568 is a wasteful number, since it uses less digits than its factorization.

51777568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618059 (or 1618051 counting only the distinct ones).

The product of its digits is 411600, while the sum is 46.

The square root of 51777568 is about 7195.6631383077. The cubic root of 51777568 is about 372.7181563721.

The spelling of 51777568 in words is "fifty-one million, seven hundred seventy-seven thousand, five hundred sixty-eight".