91836463820 has 24 divisors (see below), whose sum is σ = 195023505600. Its totient is φ = 36321836672.

The previous prime is 91836463811. The next prime is 91836463841. The reversal of 91836463820 is 2836463819.

It is a happy 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, 25794980 + ... + 25798539.

It is an arithmetic number, because the mean of its divisors is an integer number (8125979400).

Almost surely, 2^91836463820 is an apocalyptic number.

It is an amenable number.

91836463820 is an abundant number, since it is smaller than the sum of its proper divisors (103187041780).

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

91836463820 is a wasteful number, since it uses less digits than its factorization.

91836463820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51593617 (or 51593615 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 91836463820 in words is "ninety-one billion, eight hundred thirty-six million, four hundred sixty-three thousand, eight hundred twenty".