91084425715 has 32 divisors (see below), whose sum is σ = 116456520960. Its totient is φ = 68152541184.

The previous prime is 91084425673. The next prime is 91084425787. The reversal of 91084425715 is 51752448019.

It is a cyclic number.

It is not a de Polignac number, because 91084425715 - 2¹⁵ = 91084392947 is a prime.

It is a super-2 number, since 2×91084425715² (a number of 23 digits) contains 22 as substring.

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, 8960806 + ... + 8970964.

It is an arithmetic number, because the mean of its divisors is an integer number (3639266280).

Almost surely, 2^91084425715 is an apocalyptic number.

91084425715 is a deficient number, since it is larger than the sum of its proper divisors (25372095245).

91084425715 is a wasteful number, since it uses less digits than its factorization.

91084425715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10831.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 91084425715 in words is "ninety-one billion, eighty-four million, four hundred twenty-five thousand, seven hundred fifteen".