425881716781 has 64 divisors (see below), whose sum is σ = 492090163200. Its totient is φ = 366073399296.

The previous prime is 425881716779. The next prime is 425881716803. The reversal of 425881716781 is 187617188524.

It is a cyclic number.

It is not a de Polignac number, because 425881716781 - 2¹ = 425881716779 is a prime.

It is a super-2 number, since 2×425881716781² (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 (425881716721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 517474336 + ... + 517475158.

It is an arithmetic number, because the mean of its divisors is an integer number (7688908800).

Almost surely, 2^425881716781 is an apocalyptic number.

It is an amenable number.

425881716781 is a deficient number, since it is larger than the sum of its proper divisors (66208446419).

425881716781 is a wasteful number, since it uses less digits than its factorization.

425881716781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378.

The product of its digits is 6021120, while the sum is 58.

The spelling of 425881716781 in words is "four hundred twenty-five billion, eight hundred eighty-one million, seven hundred sixteen thousand, seven hundred eighty-one".