255402042425 has 6 divisors (see below), whose sum is σ = 316698532638. Its totient is φ = 204321633920.

The previous prime is 255402042409. The next prime is 255402042457. The reversal of 255402042425 is 524240204552.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 985708816 + 254416333609 = 31396^2 + 504397^2 .

It is not a de Polignac number, because 255402042425 - 2⁴ = 255402042409 is a prime.

It is a super-2 number, since 2×255402042425² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5108040824 + ... + 5108040873.

It is an arithmetic number, because the mean of its divisors is an integer number (52783088773).

Almost surely, 2^255402042425 is an apocalyptic number.

255402042425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255402042425 is a deficient number, since it is larger than the sum of its proper divisors (61296490213).

255402042425 is a wasteful number, since it uses less digits than its factorization.

255402042425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10216081707 (or 10216081702 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 35.

Adding to 255402042425 its reverse (524240204552), we get a palindrome (779642246977).

The spelling of 255402042425 in words is "two hundred fifty-five billion, four hundred two million, forty-two thousand, four hundred twenty-five".