775561856890 has 16 divisors (see below), whose sum is σ = 1397069752320. Its totient is φ = 309989540560.

The previous prime is 775561856869. The next prime is 775561856893. The reversal of 775561856890 is 98658165577.

It is not an unprimeable number, because it can be changed into a prime (775561856893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29386426 + ... + 29412805.

It is an arithmetic number, because the mean of its divisors is an integer number (87316859520).

Almost surely, 2^775561856890 is an apocalyptic number.

775561856890 is a deficient number, since it is larger than the sum of its proper divisors (621507895430).

775561856890 is a wasteful number, since it uses less digits than its factorization.

775561856890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58800557.

The product of its (nonzero) digits is 127008000, while the sum is 67.

The spelling of 775561856890 in words is "seven hundred seventy-five billion, five hundred sixty-one million, eight hundred fifty-six thousand, eight hundred ninety".