91062661108840 has 64 divisors (see below), whose sum is σ = 206518047282000. Its totient is φ = 36136941496320.

The previous prime is 91062661108823. The next prime is 91062661108847. The reversal of 91062661108840 is 4880116626019.

It can be written as a sum of positive squares in 8 ways, for example, as 83108129045956 + 7954532062884 = 9116366^2 + 2820378^2 .

It is a super-2 number, since 2×91062661108840² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91062661108847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15115255 + ... + 20263174.

Almost surely, 2^{91062661108840} is an apocalyptic number.

It is an amenable number.

91062661108840 is an abundant number, since it is smaller than the sum of its proper divisors (115455386173160).

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

91062661108840 is a wasteful number, since it uses less digits than its factorization.

91062661108840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35378950 (or 35378946 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 91062661108840 in words is "ninety-one trillion, sixty-two billion, six hundred sixty-one million, one hundred eight thousand, eight hundred forty".