99541512005 has 16 divisors (see below), whose sum is σ = 129348985584. Its totient is φ = 73101450240.

The previous prime is 99541511987. The next prime is 99541512019. The reversal of 99541512005 is 50021514599.

It is a Cunningham number, because it is equal to 315502²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 63706264801 + 35835247204 = 252401^2 + 189302^2 .

It is not a de Polignac number, because 99541512005 - 2¹⁶ = 99541446469 is a prime.

It is a super-2 number, since 2×99541512005² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4218644 + ... + 4242173.

It is an arithmetic number, because the mean of its divisors is an integer number (8084311599).

Almost surely, 2^99541512005 is an apocalyptic number.

It is an amenable number.

99541512005 is a deficient number, since it is larger than the sum of its proper divisors (29807473579).

99541512005 is a wasteful number, since it uses less digits than its factorization.

99541512005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8461016.

The product of its (nonzero) digits is 81000, while the sum is 41.

The spelling of 99541512005 in words is "ninety-nine billion, five hundred forty-one million, five hundred twelve thousand, five".