91481125838 has 8 divisors (see below), whose sum is σ = 137225879832. Its totient is φ = 45739165896.

The previous prime is 91481125823. The next prime is 91481125847. The reversal of 91481125838 is 83852118419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614645 + ... + 748832.

It is an arithmetic number, because the mean of its divisors is an integer number (17153234979).

Almost surely, 2^91481125838 is an apocalyptic number.

91481125838 is a deficient number, since it is larger than the sum of its proper divisors (45744753994).

91481125838 is a wasteful number, since it uses less digits than its factorization.

91481125838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397026.

The product of its digits is 552960, while the sum is 50.

The spelling of 91481125838 in words is "ninety-one billion, four hundred eighty-one million, one hundred twenty-five thousand, eight hundred thirty-eight".