425405865391 has 8 divisors (see below), whose sum is σ = 482241467120. Its totient is φ = 372014845632.

The previous prime is 425405865389. The next prime is 425405865407. The reversal of 425405865391 is 193568504524.

It is a happy number.

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 425405865391 - 2¹ = 425405865389 is a prime.

It is a super-2 number, since 2×425405865391² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425405865371) 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, 861145230 + ... + 861145723.

It is an arithmetic number, because the mean of its divisors is an integer number (60280183390).

Almost surely, 2^425405865391 is an apocalyptic number.

425405865391 is a deficient number, since it is larger than the sum of its proper divisors (56835601729).

425405865391 is a wasteful number, since it uses less digits than its factorization.

425405865391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722290985.

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 425405865391 in words is "four hundred twenty-five billion, four hundred five million, eight hundred sixty-five thousand, three hundred ninety-one".