869778405122 has 48 divisors (see below), whose sum is σ = 1479604039200. Its totient is φ = 382935537600.

The previous prime is 869778405121. The next prime is 869778405127. The reversal of 869778405122 is 221504877968.

It is not an unprimeable number, because it can be changed into a prime (869778405121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1063829 + ... + 1694487.

It is an arithmetic number, because the mean of its divisors is an integer number (30825084150).

Almost surely, 2^869778405122 is an apocalyptic number.

869778405122 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

869778405122 is a deficient number, since it is larger than the sum of its proper divisors (609825634078).

869778405122 is a wasteful number, since it uses less digits than its factorization.

869778405122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630863 (or 630852 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 869778405122 in words is "eight hundred sixty-nine billion, seven hundred seventy-eight million, four hundred five thousand, one hundred twenty-two".