91683425858 has 4 divisors (see below), whose sum is σ = 137525138790. Its totient is φ = 45841712928.

The previous prime is 91683425851. The next prime is 91683425927. The reversal of 91683425858 is 85852438619.

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., 73849693009 + 17833732849 = 271753^2 + 133543^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91683425797 and 91683425806.

It is not an unprimeable number, because it can be changed into a prime (91683425851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22920856463 + ... + 22920856466.

Almost surely, 2^91683425858 is an apocalyptic number.

91683425858 is a deficient number, since it is larger than the sum of its proper divisors (45841712932).

91683425858 is a wasteful number, since it uses less digits than its factorization.

91683425858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45841712931.

The product of its digits is 16588800, while the sum is 59.

The spelling of 91683425858 in words is "ninety-one billion, six hundred eighty-three million, four hundred twenty-five thousand, eight hundred fifty-eight".