11391091357 has 2 divisors, whose sum is σ = 11391091358. Its totient is φ = 11391091356.

The previous prime is 11391091351. The next prime is 11391091381. The reversal of 11391091357 is 75319019311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9173999961 + 2217091396 = 95781^2 + 47086^2 .

It is a cyclic number.

It is not a de Polignac number, because 11391091357 - 2¹⁵ = 11391058589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11391091351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5695545678 + 5695545679.

It is an arithmetic number, because the mean of its divisors is an integer number (5695545679).

Almost surely, 2^11391091357 is an apocalyptic number.

It is an amenable number.

11391091357 is a deficient number, since it is larger than the sum of its proper divisors (1).

11391091357 is an equidigital number, since it uses as much as digits as its factorization.

11391091357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 40.

The spelling of 11391091357 in words is "eleven billion, three hundred ninety-one million, ninety-one thousand, three hundred fifty-seven".