91463677440 has 320 divisors, whose sum is σ = 325901283840. Its totient is φ = 21746810880.

The previous prime is 91463677391. The next prime is 91463677453. The reversal of 91463677440 is 4477636419.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2462205 + ... + 2499075.

It is an arithmetic number, because the mean of its divisors is an integer number (1018441512).

Almost surely, 2^91463677440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91463677440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162950641920).

91463677440 is an abundant number, since it is smaller than the sum of its proper divisors (234437606400).

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

91463677440 is a wasteful number, since it uses less digits than its factorization.

91463677440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36933 (or 36917 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 91463677440 in words is "ninety-one billion, four hundred sixty-three million, six hundred seventy-seven thousand, four hundred forty".