91405498450 has 24 divisors (see below), whose sum is σ = 194301974592. Its totient is φ = 31339027920.

The previous prime is 91405498423. The next prime is 91405498531. The reversal of 91405498450 is 5489450419.

It is a junction number, because it is equal to n+sod(n) for n = 91405498394 and 91405498403.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130578934 + ... + 130579633.

It is an arithmetic number, because the mean of its divisors is an integer number (8095915608).

Almost surely, 2^91405498450 is an apocalyptic number.

91405498450 is an abundant number, since it is smaller than the sum of its proper divisors (102896476142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91405498450 is a wasteful number, since it uses less digits than its factorization.

91405498450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261158586 (or 261158581 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 91405498450 in words is "ninety-one billion, four hundred five million, four hundred ninety-eight thousand, four hundred fifty".