91738717456 has 15 divisors (see below), whose sum is σ = 177746112453. Its totient is φ = 45868752960.

The previous prime is 91738717453. The next prime is 91738717459. The reversal of 91738717456 is 65471783719.

The square root of 91738717456 is 302884.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (91738717453) and next prime (91738717459).

It can be written as a sum of positive squares in only one way, i.e., 292957456 + 91445760000 = 17116^2 + 302400^2 .

It is a super-2 number, since 2×91738717456² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91738717456.

It is not an unprimeable number, because it can be changed into a prime (91738717453) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 1173676 + ... + 1249396.

Almost surely, 2^91738717456 is an apocalyptic number.

91738717456 is the 302884-th square number.

It is an amenable number.

91738717456 is a deficient number, since it is larger than the sum of its proper divisors (86007394997).

91738717456 is an frugal number, since it uses more digits than its factorization.

91738717456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151450 (or 75723 counting only the distinct ones).

The product of its digits is 8890560, while the sum is 58.

The spelling of 91738717456 in words is "ninety-one billion, seven hundred thirty-eight million, seven hundred seventeen thousand, four hundred fifty-six".