51540000773 has 2 divisors, whose sum is σ = 51540000774. Its totient is φ = 51540000772.

The previous prime is 51540000763. The next prime is 51540000791. The reversal of 51540000773 is 37700004515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39538140964 + 12001859809 = 198842^2 + 109553^2 .

It is a cyclic number.

It is not a de Polignac number, because 51540000773 - 2³⁰ = 50466258949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51540000703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25770000386 + 25770000387.

It is an arithmetic number, because the mean of its divisors is an integer number (25770000387).

Almost surely, 2^51540000773 is an apocalyptic number.

It is an amenable number.

51540000773 is a deficient number, since it is larger than the sum of its proper divisors (1).

51540000773 is an equidigital number, since it uses as much as digits as its factorization.

51540000773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14700, while the sum is 32.

The spelling of 51540000773 in words is "fifty-one billion, five hundred forty million, seven hundred seventy-three", and thus it is an aban number.