91676640240 has 320 divisors, whose sum is σ = 335099980800. Its totient is φ = 22987109376.

The previous prime is 91676640229. The next prime is 91676640241. The reversal of 91676640240 is 4204667619.

91676640240 is a `hidden beast` number, since 91 + 67 + 66 + 402 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91676640241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2915482 + ... + 2946758.

It is an arithmetic number, because the mean of its divisors is an integer number (1047187440).

Almost surely, 2^91676640240 is an apocalyptic number.

91676640240 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91676640240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167549990400).

91676640240 is an abundant number, since it is smaller than the sum of its proper divisors (243423340560).

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

91676640240 is a wasteful number, since it uses less digits than its factorization.

91676640240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31381 (or 31369 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 91676640240 in words is "ninety-one billion, six hundred seventy-six million, six hundred forty thousand, two hundred forty".