91571698276608 has 864 divisors, whose sum is σ = 276715097358336. Its totient is φ = 26853894144000.

The previous prime is 91571698276549. The next prime is 91571698276609. The reversal of 91571698276608 is 80667289617519.

It is a self number, because there is not a number n which added to its sum of digits gives 91571698276608.

It is not an unprimeable number, because it can be changed into a prime (91571698276609) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 86306972398 + ... + 86306973458.

It is an arithmetic number, because the mean of its divisors is an integer number (320272103424).

Almost surely, 2^{91571698276608} 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 91571698276608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138357548679168).

91571698276608 is an abundant number, since it is smaller than the sum of its proper divisors (185143399081728).

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

91571698276608 is a wasteful number, since it uses less digits than its factorization.

91571698276608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 1378 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 75.

The spelling of 91571698276608 in words is "ninety-one trillion, five hundred seventy-one billion, six hundred ninety-eight million, two hundred seventy-six thousand, six hundred eight".