91426545940 has 12 divisors (see below), whose sum is σ = 191995746516. Its totient is φ = 36570618368.

The previous prime is 91426545913. The next prime is 91426545941. The reversal of 91426545940 is 4954562419.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59894730756 + 31531815184 = 244734^2 + 177572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91426545941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2285663629 + ... + 2285663668.

It is an arithmetic number, because the mean of its divisors is an integer number (15999645543).

Almost surely, 2^91426545940 is an apocalyptic number.

It is an amenable number.

91426545940 is an abundant number, since it is smaller than the sum of its proper divisors (100569200576).

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

91426545940 is a wasteful number, since it uses less digits than its factorization.

91426545940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571327306 (or 4571327304 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 91426545940 in words is "ninety-one billion, four hundred twenty-six million, five hundred forty-five thousand, nine hundred forty".