91200051286 has 4 divisors (see below), whose sum is σ = 136800076932. Its totient is φ = 45600025642.

The previous prime is 91200051251. The next prime is 91200051289. The reversal of 91200051286 is 68215000219.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91200051289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22800012820 + ... + 22800012823.

It is an arithmetic number, because the mean of its divisors is an integer number (34200019233).

Almost surely, 2^91200051286 is an apocalyptic number.

91200051286 is a deficient number, since it is larger than the sum of its proper divisors (45600025646).

91200051286 is a wasteful number, since it uses less digits than its factorization.

91200051286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45600025645.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 91200051286 in words is "ninety-one billion, two hundred million, fifty-one thousand, two hundred eighty-six".