91135654238 has 8 divisors (see below), whose sum is σ = 139282792488. Its totient is φ = 44708056744.

The previous prime is 91135654213. The next prime is 91135654241. The reversal of 91135654238 is 83245653119.

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

It is a junction number, because it is equal to n+sod(n) for n = 91135654192 and 91135654201.

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, 429885056 + ... + 429885267.

It is an arithmetic number, because the mean of its divisors is an integer number (17410349061).

Almost surely, 2^91135654238 is an apocalyptic number.

91135654238 is a deficient number, since it is larger than the sum of its proper divisors (48147138250).

91135654238 is a wasteful number, since it uses less digits than its factorization.

91135654238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859770378.

The product of its digits is 777600, while the sum is 47.

The spelling of 91135654238 in words is "ninety-one billion, one hundred thirty-five million, six hundred fifty-four thousand, two hundred thirty-eight".