91063781297 has 16 divisors (see below), whose sum is σ = 96329426688. Its totient is φ = 85913572800.

The previous prime is 91063781231. The next prime is 91063781321. The reversal of 91063781297 is 79218736019.

It is a cyclic number.

It is not a de Polignac number, because 91063781297 - 2⁸ = 91063781041 is a prime.

It is a super-2 number, since 2×91063781297² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91063781227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536423 + ... + 685475.

It is an arithmetic number, because the mean of its divisors is an integer number (6020589168).

Almost surely, 2^91063781297 is an apocalyptic number.

It is an amenable number.

91063781297 is a deficient number, since it is larger than the sum of its proper divisors (5265645391).

91063781297 is a wasteful number, since it uses less digits than its factorization.

91063781297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149440.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 91063781297 in words is "ninety-one billion, sixty-three million, seven hundred eighty-one thousand, two hundred ninety-seven".