426645704229921 has 12 divisors (see below), whose sum is σ = 672290200604880. Its totient is φ = 258573154078680.

The previous prime is 426645704229869. The next prime is 426645704229959. The reversal of 426645704229921 is 129922407546624.

426645704229921 is a `hidden beast` number, since 4 + 2 + 66 + 45 + 7 + 0 + 422 + 99 + 21 = 666.

It is not a de Polignac number, because 426645704229921 - 2²⁶ = 426645637121057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (426645704229991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2154776283891 + ... + 2154776284088.

It is an arithmetic number, because the mean of its divisors is an integer number (56024183383740).

Almost surely, 2^{426645704229921} is an apocalyptic number.

It is an amenable number.

426645704229921 is a deficient number, since it is larger than the sum of its proper divisors (245644496374959).

426645704229921 is a wasteful number, since it uses less digits than its factorization.

426645704229921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309552567996 (or 4309552567993 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 63.

The spelling of 426645704229921 in words is "four hundred twenty-six trillion, six hundred forty-five billion, seven hundred four million, two hundred twenty-nine thousand, nine hundred twenty-one".