51676900997 has 2 divisors, whose sum is σ = 51676900998. Its totient is φ = 51676900996.

The previous prime is 51676900991. The next prime is 51676901021. The reversal of 51676900997 is 79900967615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49582374241 + 2094526756 = 222671^2 + 45766^2 .

It is a cyclic number.

It is not a de Polignac number, because 51676900997 - 2³⁴ = 34497031813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51676900991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25838450498 + 25838450499.

It is an arithmetic number, because the mean of its divisors is an integer number (25838450499).

Almost surely, 2^51676900997 is an apocalyptic number.

It is an amenable number.

51676900997 is a deficient number, since it is larger than the sum of its proper divisors (1).

51676900997 is an equidigital number, since it uses as much as digits as its factorization.

51676900997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6429780, while the sum is 59.

The spelling of 51676900997 in words is "fifty-one billion, six hundred seventy-six million, nine hundred thousand, nine hundred ninety-seven".