91706796870 has 128 divisors (see below), whose sum is σ = 247772528640. Its totient is φ = 21569034240.

The previous prime is 91706796827. The next prime is 91706796887. The reversal of 91706796870 is 7869760719.

It is a happy number.

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, 907102 + ... + 1003118.

It is an arithmetic number, because the mean of its divisors is an integer number (1935722880).

Almost surely, 2^91706796870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91706796870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123886264320).

91706796870 is an abundant number, since it is smaller than the sum of its proper divisors (156065731770).

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

91706796870 is a wasteful number, since it uses less digits than its factorization.

91706796870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96150.

The product of its (nonzero) digits is 8001504, while the sum is 60.

The spelling of 91706796870 in words is "ninety-one billion, seven hundred six million, seven hundred ninety-six thousand, eight hundred seventy".