90421170796751 has 2 divisors, whose sum is σ = 90421170796752. Its totient is φ = 90421170796750.

The previous prime is 90421170796601. The next prime is 90421170796793. The reversal of 90421170796751 is 15769707112409.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90421170796751 - 2⁴² = 86023124285647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90421170756751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45210585398375 + 45210585398376.

It is an arithmetic number, because the mean of its divisors is an integer number (45210585398376).

Almost surely, 2^{90421170796751} is an apocalyptic number.

90421170796751 is a deficient number, since it is larger than the sum of its proper divisors (1).

90421170796751 is an equidigital number, since it uses as much as digits as its factorization.

90421170796751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6667920, while the sum is 59.

The spelling of 90421170796751 in words is "ninety trillion, four hundred twenty-one billion, one hundred seventy million, seven hundred ninety-six thousand, seven hundred fifty-one".