91763497280 has 448 divisors, whose sum is σ = 277866408960. Its totient is φ = 28090368000.

The previous prime is 91763497271. The next prime is 91763497291. The reversal of 91763497280 is 8279436719.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 180281666 + ... + 180282174.

It is an arithmetic number, because the mean of its divisors is an integer number (620237520).

Almost surely, 2^91763497280 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 91763497280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138933204480).

91763497280 is an abundant number, since it is smaller than the sum of its proper divisors (186102911680).

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

91763497280 is a wasteful number, since it uses less digits than its factorization.

91763497280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 91763497280 in words is "ninety-one billion, seven hundred sixty-three million, four hundred ninety-seven thousand, two hundred eighty".