91409435639198 has 8 divisors (see below), whose sum is σ = 137115636003408. Its totient is φ = 45704223638064.

The previous prime is 91409435639147. The next prime is 91409435639237. The reversal of 91409435639198 is 89193653490419.

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

It is a Curzon number.

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, 246859511 + ... + 247229522.

It is an arithmetic number, because the mean of its divisors is an integer number (17139454500426).

Almost surely, 2^{91409435639198} is an apocalyptic number.

91409435639198 is a deficient number, since it is larger than the sum of its proper divisors (45706200364210).

91409435639198 is a wasteful number, since it uses less digits than its factorization.

91409435639198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494181538.

The product of its (nonzero) digits is 226748160, while the sum is 71.

The spelling of 91409435639198 in words is "ninety-one trillion, four hundred nine billion, four hundred thirty-five million, six hundred thirty-nine thousand, one hundred ninety-eight".