51910023961 has 2 divisors, whose sum is σ = 51910023962. Its totient is φ = 51910023960.

The previous prime is 51910023947. The next prime is 51910024007. The reversal of 51910023961 is 16932001915.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48215815561 + 3694208400 = 219581^2 + 60780^2 .

It is a cyclic number.

It is not a de Polignac number, because 51910023961 - 2⁵ = 51910023929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51910023961.

It is not a weakly prime, because it can be changed into another prime (51910023901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25955011980 + 25955011981.

It is an arithmetic number, because the mean of its divisors is an integer number (25955011981).

Almost surely, 2^51910023961 is an apocalyptic number.

It is an amenable number.

51910023961 is a deficient number, since it is larger than the sum of its proper divisors (1).

51910023961 is an equidigital number, since it uses as much as digits as its factorization.

51910023961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The spelling of 51910023961 in words is "fifty-one billion, nine hundred ten million, twenty-three thousand, nine hundred sixty-one".