425238665251 has 4 divisors (see below), whose sum is σ = 428054815504. Its totient is φ = 422422515000.

The previous prime is 425238665233. The next prime is 425238665281. The reversal of 425238665251 is 152566832524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 425238665251 - 2⁵ = 425238665219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 425238665195 and 425238665204.

It is not an unprimeable number, because it can be changed into a prime (425238665281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1408074900 + ... + 1408075201.

It is an arithmetic number, because the mean of its divisors is an integer number (107013703876).

Almost surely, 2^425238665251 is an apocalyptic number.

425238665251 is a deficient number, since it is larger than the sum of its proper divisors (2816150253).

425238665251 is a wasteful number, since it uses less digits than its factorization.

425238665251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816150252.

The product of its digits is 3456000, while the sum is 49.

The spelling of 425238665251 in words is "four hundred twenty-five billion, two hundred thirty-eight million, six hundred sixty-five thousand, two hundred fifty-one".