51098903969 has 2 divisors, whose sum is σ = 51098903970. Its totient is φ = 51098903968.

The previous prime is 51098903953. The next prime is 51098903993. The reversal of 51098903969 is 96930989015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41325604369 + 9773299600 = 203287^2 + 98860^2 .

It is a cyclic number.

It is not a de Polignac number, because 51098903969 - 2⁴ = 51098903953 is a prime.

It is a super-2 number, since 2×51098903969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51098905969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25549451984 + 25549451985.

It is an arithmetic number, because the mean of its divisors is an integer number (25549451985).

Almost surely, 2^51098903969 is an apocalyptic number.

It is an amenable number.

51098903969 is a deficient number, since it is larger than the sum of its proper divisors (1).

51098903969 is an equidigital number, since it uses as much as digits as its factorization.

51098903969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4723920, while the sum is 59.

The spelling of 51098903969 in words is "fifty-one billion, ninety-eight million, nine hundred three thousand, nine hundred sixty-nine".