91862790805 has 8 divisors (see below), whose sum is σ = 110255508792. Its totient is φ = 73476792768.

The previous prime is 91862790797. The next prime is 91862790829. The reversal of 91862790805 is 50809726819.

It can be written as a sum of positive squares in 4 ways, for example, as 57873443761 + 33989347044 = 240569^2 + 184362^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91862790805 - 2³ = 91862790797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1649862 + ... + 1704631.

It is an arithmetic number, because the mean of its divisors is an integer number (13781938599).

Almost surely, 2^91862790805 is an apocalyptic number.

It is an amenable number.

91862790805 is a deficient number, since it is larger than the sum of its proper divisors (18392717987).

91862790805 is a wasteful number, since it uses less digits than its factorization.

91862790805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359975.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 91862790805 in words is "ninety-one billion, eight hundred sixty-two million, seven hundred ninety thousand, eight hundred five".