91348513451249 has 2 divisors, whose sum is σ = 91348513451250. Its totient is φ = 91348513451248.

The previous prime is 91348513451219. The next prime is 91348513451347. The reversal of 91348513451249 is 94215431584319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65117798593600 + 26230714857649 = 8069560^2 + 5121593^2 .

It is an emirp because it is prime and its reverse (94215431584319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91348513451249 - 2³² = 91344218483953 is a prime.

It is not a weakly prime, because it can be changed into another prime (91348513451219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45674256725624 + 45674256725625.

It is an arithmetic number, because the mean of its divisors is an integer number (45674256725625).

Almost surely, 2^{91348513451249} is an apocalyptic number.

It is an amenable number.

91348513451249 is a deficient number, since it is larger than the sum of its proper divisors (1).

91348513451249 is an equidigital number, since it uses as much as digits as its factorization.

91348513451249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18662400, while the sum is 59.

The spelling of 91348513451249 in words is "ninety-one trillion, three hundred forty-eight billion, five hundred thirteen million, four hundred fifty-one thousand, two hundred forty-nine".