99999257913449 has 4 divisors (see below), whose sum is σ = 99999310876740. Its totient is φ = 99999204950160.

The previous prime is 99999257913427. The next prime is 99999257913487. The reversal of 99999257913449 is 94431975299999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85920515726224 + 14078742187225 = 9269332^2 + 3752165^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999257913449 - 2²⁴ = 99999241136233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99999257913649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23540642 + ... + 27461979.

It is an arithmetic number, because the mean of its divisors is an integer number (24999827719185).

Almost surely, 2^{99999257913449} is an apocalyptic number.

It is an amenable number.

99999257913449 is a deficient number, since it is larger than the sum of its proper divisors (52963291).

99999257913449 is a wasteful number, since it uses less digits than its factorization.

99999257913449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52963290.

The product of its digits is 16070775840, while the sum is 89.

The spelling of 99999257913449 in words is "ninety-nine trillion, nine hundred ninety-nine billion, two hundred fifty-seven million, nine hundred thirteen thousand, four hundred forty-nine".