425921387616 has 168 divisors, whose sum is σ = 1257831928584. Its totient is φ = 141905157120.

The previous prime is 425921387597. The next prime is 425921387651. The reversal of 425921387616 is 616783129524.

It is a happy number.

425921387616 is a `hidden beast` number, since 4 + 2 + 5 + 9 + 2 + 13 + 8 + 7 + 616 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 77142936 + ... + 77148456.

It is an arithmetic number, because the mean of its divisors is an integer number (7487094813).

Almost surely, 2^425921387616 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 425921387616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628915964292).

425921387616 is an abundant number, since it is smaller than the sum of its proper divisors (831910540968).

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

425921387616 is an equidigital number, since it uses as much as digits as its factorization.

425921387616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8856 (or 8833 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 425921387616 in words is "four hundred twenty-five billion, nine hundred twenty-one million, three hundred eighty-seven thousand, six hundred sixteen".