99511894541 has 2 divisors, whose sum is σ = 99511894542. Its totient is φ = 99511894540.

The previous prime is 99511894529. The next prime is 99511894561. The reversal of 99511894541 is 14549811599.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99077005225 + 434889316 = 314765^2 + 20854^2 .

It is an emirp because it is prime and its reverse (14549811599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99511894541 - 2²⁶ = 99444785677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99511894561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49755947270 + 49755947271.

It is an arithmetic number, because the mean of its divisors is an integer number (49755947271).

Almost surely, 2^99511894541 is an apocalyptic number.

It is an amenable number.

99511894541 is a deficient number, since it is larger than the sum of its proper divisors (1).

99511894541 is an equidigital number, since it uses as much as digits as its factorization.

99511894541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 56.

The spelling of 99511894541 in words is "ninety-nine billion, five hundred eleven million, eight hundred ninety-four thousand, five hundred forty-one".