91755055719 has 8 divisors (see below), whose sum is σ = 135933415920. Its totient is φ = 61170037128.

The previous prime is 91755055709. The next prime is 91755055729.

It is a happy number.

91755055719 is a `hidden beast` number, since 9 + 1 + 75 + 5 + 0 + 557 + 19 = 666.

91755055719 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (91755055709) and next prime (91755055729).

It is not a de Polignac number, because 91755055719 - 2⁷ = 91755055591 is a prime.

It is a super-2 number, since 2×91755055719² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91755055709) 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, 1699167672 + ... + 1699167725.

It is an arithmetic number, because the mean of its divisors is an integer number (16991676990).

Almost surely, 2^91755055719 is an apocalyptic number.

91755055719 is a deficient number, since it is larger than the sum of its proper divisors (44178360201).

91755055719 is a wasteful number, since it uses less digits than its factorization.

91755055719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398335406 (or 3398335400 counting only the distinct ones).

The product of its (nonzero) digits is 2480625, while the sum is 54.

The spelling of 91755055719 in words is "ninety-one billion, seven hundred fifty-five million, fifty-five thousand, seven hundred nineteen".