51687810020077 has 12 divisors (see below), whose sum is σ = 64930141513888. Its totient is φ = 40276215599400.

The previous prime is 51687810020057. The next prime is 51687810020087. The reversal of 51687810020077 is 77002001878615.

It is not a de Polignac number, because 51687810020077 - 2²³ = 51687801631469 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51687810020057) 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, 30512283699 + ... + 30512285392.

Almost surely, 2^{51687810020077} is an apocalyptic number.

It is an amenable number.

51687810020077 is a deficient number, since it is larger than the sum of its proper divisors (13242331493811).

51687810020077 is a wasteful number, since it uses less digits than its factorization.

51687810020077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61024569120 (or 61024569109 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 52.

The spelling of 51687810020077 in words is "fifty-one trillion, six hundred eighty-seven billion, eight hundred ten million, twenty thousand, seventy-seven".