425833518421 has 8 divisors (see below), whose sum is σ = 426467649464. Its totient is φ = 425199533760.

The previous prime is 425833518401. The next prime is 425833518431. The reversal of 425833518421 is 124815338524.

It can be written as a sum of positive squares in 4 ways, for example, as 83152066321 + 342681452100 = 288361^2 + 585390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 425833518421 - 2⁵ = 425833518389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425833518401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6698035 + ... + 6761311.

It is an arithmetic number, because the mean of its divisors is an integer number (53308456183).

Almost surely, 2^425833518421 is an apocalyptic number.

It is an amenable number.

425833518421 is a deficient number, since it is larger than the sum of its proper divisors (634131043).

425833518421 is an equidigital number, since it uses as much as digits as its factorization.

425833518421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73191.

The product of its digits is 921600, while the sum is 46.

The spelling of 425833518421 in words is "four hundred twenty-five billion, eight hundred thirty-three million, five hundred eighteen thousand, four hundred twenty-one".