99975641815 has 64 divisors (see below), whose sum is σ = 146461271040. Its totient is φ = 63989913600.

The previous prime is 99975641791. The next prime is 99975641833. The reversal of 99975641815 is 51814657999.

It is not a de Polignac number, because 99975641815 - 2¹³ = 99975633623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22130937 + ... + 22135453.

It is an arithmetic number, because the mean of its divisors is an integer number (2288457360).

Almost surely, 2^99975641815 is an apocalyptic number.

99975641815 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99975641815 is the 158095-th decagonal number.

99975641815 is a deficient number, since it is larger than the sum of its proper divisors (46485629225).

99975641815 is a wasteful number, since it uses less digits than its factorization.

99975641815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032.

The product of its digits is 24494400, while the sum is 64.

The spelling of 99975641815 in words is "ninety-nine billion, nine hundred seventy-five million, six hundred forty-one thousand, eight hundred fifteen".