425551779 has 32 divisors (see below), whose sum is σ = 647539200. Its totient is φ = 276060960.

The previous prime is 425551747. The next prime is 425551781. The reversal of 425551779 is 977155524.

425551779 is a `hidden beast` number, since 4 + 25 + 551 + 7 + 79 = 666.

It is not a de Polignac number, because 425551779 - 2⁵ = 425551747 is a prime.

It is a super-2 number, since 2×425551779² = 362188633220129682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (425551579) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 416289 + ... + 417309.

It is an arithmetic number, because the mean of its divisors is an integer number (20235600).

Almost surely, 2^425551779 is an apocalyptic number.

425551779 is a deficient number, since it is larger than the sum of its proper divisors (221987421).

425551779 is a wasteful number, since it uses less digits than its factorization.

425551779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432 (or 1426 counting only the distinct ones).

The product of its digits is 441000, while the sum is 45.

The square root of 425551779 is about 20628.9063936991. The cubic root of 425551779 is about 752.1725327256.

The spelling of 425551779 in words is "four hundred twenty-five million, five hundred fifty-one thousand, seven hundred seventy-nine".