91269843820 has 24 divisors (see below), whose sum is σ = 193564366128. Its totient is φ = 36146472000.

The previous prime is 91269843761. The next prime is 91269843823. The reversal of 91269843820 is 2834896219.

It is not an unprimeable number, because it can be changed into a prime (91269843823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22589526 + ... + 22593565.

It is an arithmetic number, because the mean of its divisors is an integer number (8065181922).

Almost surely, 2^91269843820 is an apocalyptic number.

It is an amenable number.

91269843820 is an abundant number, since it is smaller than the sum of its proper divisors (102294522308).

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

91269843820 is a wasteful number, since it uses less digits than its factorization.

91269843820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45183201 (or 45183199 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

It can be divided in two parts, 91269 and 843820, that added together give a square (935089 = 967²).

The spelling of 91269843820 in words is "ninety-one billion, two hundred sixty-nine million, eight hundred forty-three thousand, eight hundred twenty".