686370552811 has 2 divisors, whose sum is σ = 686370552812. Its totient is φ = 686370552810.

The previous prime is 686370552677. The next prime is 686370552863. The reversal of 686370552811 is 118255073686.

It is an a-pointer prime, because the next prime (686370552863) can be obtained adding 686370552811 to its sum of digits (52).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686370552811 - 2⁹ = 686370552299 is a prime.

It is a super-2 number, since 2×686370552811² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (686370552211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343185276405 + 343185276406.

It is an arithmetic number, because the mean of its divisors is an integer number (343185276406).

Almost surely, 2^686370552811 is an apocalyptic number.

686370552811 is a deficient number, since it is larger than the sum of its proper divisors (1).

686370552811 is an equidigital number, since it uses as much as digits as its factorization.

686370552811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 686370552811 in words is "six hundred eighty-six billion, three hundred seventy million, five hundred fifty-two thousand, eight hundred eleven".