425518364477 has 4 divisors (see below), whose sum is σ = 425524525440. Its totient is φ = 425512203516.

The previous prime is 425518364449. The next prime is 425518364507. The reversal of 425518364477 is 774463815524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 425518364477 - 2¹² = 425518360381 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 (425518364417) 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, 2975693 + ... + 3115410.

It is an arithmetic number, because the mean of its divisors is an integer number (106381131360).

Almost surely, 2^425518364477 is an apocalyptic number.

It is an amenable number.

425518364477 is a deficient number, since it is larger than the sum of its proper divisors (6160963).

425518364477 is an equidigital number, since it uses as much as digits as its factorization.

425518364477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160962.

The product of its digits is 22579200, while the sum is 56.

The spelling of 425518364477 in words is "four hundred twenty-five billion, five hundred eighteen million, three hundred sixty-four thousand, four hundred seventy-seven".