91055287140 has 48 divisors (see below), whose sum is σ = 255009511680. Its totient is φ = 24276199680.

The previous prime is 91055287133. The next prime is 91055287153. The reversal of 91055287140 is 4178255019.

It is a super-2 number, since 2×91055287140² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91055287092 and 91055287101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123285 + ... + 444195.

It is an arithmetic number, because the mean of its divisors is an integer number (5312698160).

Almost surely, 2^91055287140 is an apocalyptic number.

It is an amenable number.

91055287140 is an abundant number, since it is smaller than the sum of its proper divisors (163954224540).

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

91055287140 is a wasteful number, since it uses less digits than its factorization.

91055287140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325652 (or 325650 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 91055287140 in words is "ninety-one billion, fifty-five million, two hundred eighty-seven thousand, one hundred forty".