25428908437 has 2 divisors, whose sum is σ = 25428908438. Its totient is φ = 25428908436.

The previous prime is 25428908371. The next prime is 25428908441. The reversal of 25428908437 is 73480982452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25169505201 + 259403236 = 158649^2 + 16106^2 .

It is a cyclic number.

It is not a de Polignac number, because 25428908437 - 2¹⁵ = 25428875669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25428909437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12714454218 + 12714454219.

It is an arithmetic number, because the mean of its divisors is an integer number (12714454219).

Almost surely, 2^25428908437 is an apocalyptic number.

It is an amenable number.

25428908437 is a deficient number, since it is larger than the sum of its proper divisors (1).

25428908437 is an equidigital number, since it uses as much as digits as its factorization.

25428908437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 25428908437 in words is "twenty-five billion, four hundred twenty-eight million, nine hundred eight thousand, four hundred thirty-seven".