99451943858 has 4 divisors (see below), whose sum is σ = 149177915790. Its totient is φ = 49725971928.

The previous prime is 99451943837. The next prime is 99451943861. The reversal of 99451943858 is 85834915499.

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

It can be written as a sum of positive squares in only one way, i.e., 85233050809 + 14218893049 = 291947^2 + 119243^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99451943794 and 99451943803.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24862985963 + ... + 24862985966.

Almost surely, 2^99451943858 is an apocalyptic number.

99451943858 is a deficient number, since it is larger than the sum of its proper divisors (49725971932).

99451943858 is a wasteful number, since it uses less digits than its factorization.

99451943858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49725971931.

The product of its digits is 55987200, while the sum is 65.

The spelling of 99451943858 in words is "ninety-nine billion, four hundred fifty-one million, nine hundred forty-three thousand, eight hundred fifty-eight".