2425403209257 has 40 divisors (see below), whose sum is σ = 4145985809856. Its totient is φ = 1384183388448.

The previous prime is 2425403209241. The next prime is 2425403209283. The reversal of 2425403209257 is 7529023045242.

2425403209257 is a `hidden beast` number, since 24 + 2 + 54 + 0 + 320 + 9 + 257 = 666.

It is not a de Polignac number, because 2425403209257 - 2⁴ = 2425403209241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2425403209217) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2271438 + ... + 3163895.

Almost surely, 2^{2425403209257} is an apocalyptic number.

2425403209257 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2425403209257 is a deficient number, since it is larger than the sum of its proper divisors (1720582600599).

2425403209257 is an equidigital number, since it uses as much as digits as its factorization.

2425403209257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436139 (or 5436130 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

It can be divided in two parts, 2425403 and 209257, that added together give a triangular number (2634660 = T₂₂₉₅).

The spelling of 2425403209257 in words is "two trillion, four hundred twenty-five billion, four hundred three million, two hundred nine thousand, two hundred fifty-seven".