99990000007951 has 2 divisors, whose sum is σ = 99990000007952. Its totient is φ = 99990000007950.

The previous prime is 99990000007943. The next prime is 99990000007999. The reversal of 99990000007951 is 15970000009999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99990000007951 - 2³ = 99990000007943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99990000001951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49995000003975 + 49995000003976.

It is an arithmetic number, because the mean of its divisors is an integer number (49995000003976).

Almost surely, 2^{99990000007951} is an apocalyptic number.

99990000007951 is a deficient number, since it is larger than the sum of its proper divisors (1).

99990000007951 is an equidigital number, since it uses as much as digits as its factorization.

99990000007951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2066715, while the sum is 58.

The spelling of 99990000007951 in words is "ninety-nine trillion, nine hundred ninety billion, seven thousand, nine hundred fifty-one".