425340235638 has 24 divisors (see below), whose sum is σ = 924181205688. Its totient is φ = 141378433152.

The previous prime is 425340235631. The next prime is 425340235717. The reversal of 425340235638 is 836532043524.

425340235638 is a `hidden beast` number, since 4 + 2 + 5 + 3 + 4 + 0 + 2 + 3 + 5 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 425340235593 and 425340235602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425340235631) 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, 33463920 + ... + 33476627.

It is an arithmetic number, because the mean of its divisors is an integer number (38507550237).

Almost surely, 2^425340235638 is an apocalyptic number.

425340235638 is an abundant number, since it is smaller than the sum of its proper divisors (498840970050).

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

425340235638 is a wasteful number, since it uses less digits than its factorization.

425340235638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66940908 (or 66940905 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 425340235638 in words is "four hundred twenty-five billion, three hundred forty million, two hundred thirty-five thousand, six hundred thirty-eight".