99995815807 has 2 divisors, whose sum is σ = 99995815808. Its totient is φ = 99995815806.

The previous prime is 99995815771. The next prime is 99995815813. The reversal of 99995815807 is 70851859999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99995815807 is a prime.

It is a super-2 number, since 2×99995815807² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99995815837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49997907903 + 49997907904.

It is an arithmetic number, because the mean of its divisors is an integer number (49997907904).

Almost surely, 2^99995815807 is an apocalyptic number.

99995815807 is a deficient number, since it is larger than the sum of its proper divisors (1).

99995815807 is an equidigital number, since it uses as much as digits as its factorization.

99995815807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73483200, while the sum is 70.

The spelling of 99995815807 in words is "ninety-nine billion, nine hundred ninety-five million, eight hundred fifteen thousand, eight hundred seven".