836848878449 has 2 divisors, whose sum is σ = 836848878450. Its totient is φ = 836848878448.

The previous prime is 836848878427. The next prime is 836848878451. The reversal of 836848878449 is 944878848638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583696000000 + 253152878449 = 764000^2 + 503143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-836848878449 is a prime.

It is a super-2 number, since 2×836848878449² (a number of 25 digits) contains 22 as substring.

Together with 836848878451, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 836848878449.

It is not a weakly prime, because it can be changed into another prime (836848878949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418424439224 + 418424439225.

It is an arithmetic number, because the mean of its divisors is an integer number (418424439225).

Almost surely, 2^836848878449 is an apocalyptic number.

It is an amenable number.

836848878449 is a deficient number, since it is larger than the sum of its proper divisors (1).

836848878449 is an equidigital number, since it uses as much as digits as its factorization.

836848878449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2378170368, while the sum is 77.

The spelling of 836848878449 in words is "eight hundred thirty-six billion, eight hundred forty-eight million, eight hundred seventy-eight thousand, four hundred forty-nine".