91061750256 has 40 divisors (see below), whose sum is σ = 240248027904. Its totient is φ = 29708088000.

The previous prime is 91061750233. The next prime is 91061750279. The reversal of 91061750256 is 65205716019.

It is an interprime number because it is at equal distance from previous prime (91061750233) and next prime (91061750279).

It is a super-2 number, since 2×91061750256² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20179870 + ... + 20184381.

Almost surely, 2^91061750256 is an apocalyptic number.

It is an amenable number.

91061750256 is an abundant number, since it is smaller than the sum of its proper divisors (149186277648).

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

91061750256 is a wasteful number, since it uses less digits than its factorization.

91061750256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40364309 (or 40364303 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 42.

The spelling of 91061750256 in words is "ninety-one billion, sixty-one million, seven hundred fifty thousand, two hundred fifty-six".