426721826878 has 16 divisors (see below), whose sum is σ = 677747625840. Its totient is φ = 200806431616.

The previous prime is 426721826857. The next prime is 426721826933. The reversal of 426721826878 is 878628127624.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2536608 + ... + 2699596.

It is an arithmetic number, because the mean of its divisors is an integer number (42359226615).

Almost surely, 2^426721826878 is an apocalyptic number.

426721826878 is a deficient number, since it is larger than the sum of its proper divisors (251025798962).

426721826878 is a wasteful number, since it uses less digits than its factorization.

426721826878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240011.

The product of its digits is 28901376, while the sum is 61.

The spelling of 426721826878 in words is "four hundred twenty-six billion, seven hundred twenty-one million, eight hundred twenty-six thousand, eight hundred seventy-eight".