91409832454 has 4 divisors (see below), whose sum is σ = 137114748684. Its totient is φ = 45704916226.

The previous prime is 91409832431. The next prime is 91409832457. The reversal of 91409832454 is 45423890419.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45423890419 = 39239 ⋅1157621.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 91409832398 and 91409832407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91409832457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22852458112 + ... + 22852458115.

It is an arithmetic number, because the mean of its divisors is an integer number (34278687171).

Almost surely, 2^91409832454 is an apocalyptic number.

91409832454 is a deficient number, since it is larger than the sum of its proper divisors (45704916230).

91409832454 is a wasteful number, since it uses less digits than its factorization.

91409832454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45704916229.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 91409832454 in words is "ninety-one billion, four hundred nine million, eight hundred thirty-two thousand, four hundred fifty-four".