426644421525 has 144 divisors (see below), whose sum is σ = 902127403008. Its totient is φ = 188615952000.

The previous prime is 426644421521. The next prime is 426644421551. The reversal of 426644421525 is 525124446624.

426644421525 is a `hidden beast` number, since 4 + 2 + 6 + 64 + 44 + 21 + 525 = 666.

It is not a de Polignac number, because 426644421525 - 2² = 426644421521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426644421521) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 119472990 + ... + 119476560.

It is an arithmetic number, because the mean of its divisors is an integer number (6264773632).

Almost surely, 2^426644421525 is an apocalyptic number.

426644421525 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

426644421525 is an abundant number, since it is smaller than the sum of its proper divisors (475482981483).

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

426644421525 is a wasteful number, since it uses less digits than its factorization.

426644421525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6072 (or 6064 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 45.

The spelling of 426644421525 in words is "four hundred twenty-six billion, six hundred forty-four million, four hundred twenty-one thousand, five hundred twenty-five".