11785587257 has 2 divisors, whose sum is σ = 11785587258. Its totient is φ = 11785587256.

The previous prime is 11785587239. The next prime is 11785587301. The reversal of 11785587257 is 75278558711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11054209321 + 731377936 = 105139^2 + 27044^2 .

It is a cyclic number.

It is not a de Polignac number, because 11785587257 - 2⁶ = 11785587193 is a prime.

It is not a weakly prime, because it can be changed into another prime (11785587217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5892793628 + 5892793629.

It is an arithmetic number, because the mean of its divisors is an integer number (5892793629).

Almost surely, 2^11785587257 is an apocalyptic number.

It is an amenable number.

11785587257 is a deficient number, since it is larger than the sum of its proper divisors (1).

11785587257 is an equidigital number, since it uses as much as digits as its factorization.

11785587257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5488000, while the sum is 56.

The spelling of 11785587257 in words is "eleven billion, seven hundred eighty-five million, five hundred eighty-seven thousand, two hundred fifty-seven".