426197668380 has 144 divisors (see below), whose sum is σ = 1315847544480. Its totient is φ = 102994158080.

The previous prime is 426197668363. The next prime is 426197668409. The reversal of 426197668380 is 83866791624.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2208826 + ... + 2394014.

It is an arithmetic number, because the mean of its divisors is an integer number (9137830170).

Almost surely, 2^426197668380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 426197668380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657923772240).

426197668380 is an abundant number, since it is smaller than the sum of its proper divisors (889649876100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

426197668380 is a wasteful number, since it uses less digits than its factorization.

426197668380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185540 (or 185527 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 426197668380 in words is "four hundred twenty-six billion, one hundred ninety-seven million, six hundred sixty-eight thousand, three hundred eighty".