91405498449 has 8 divisors (see below), whose sum is σ = 125167889920. Its totient is φ = 59290052976.

The previous prime is 91405498423. The next prime is 91405498531. The reversal of 91405498449 is 94489450419.

It is a happy number.

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

It is not a de Polignac number, because 91405498449 - 2¹³ = 91405490257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91405498049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411736369 + ... + 411736590.

It is an arithmetic number, because the mean of its divisors is an integer number (15645986240).

Almost surely, 2^91405498449 is an apocalyptic number.

It is an amenable number.

91405498449 is a deficient number, since it is larger than the sum of its proper divisors (33762391471).

91405498449 is a wasteful number, since it uses less digits than its factorization.

91405498449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823472999.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 91405498449 in words is "ninety-one billion, four hundred five million, four hundred ninety-eight thousand, four hundred forty-nine".