25164879437 has 2 divisors, whose sum is σ = 25164879438. Its totient is φ = 25164879436.

The previous prime is 25164879419. The next prime is 25164879461. The reversal of 25164879437 is 73497846152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23207170921 + 1957708516 = 152339^2 + 44246^2 .

It is a cyclic number.

It is not a de Polignac number, because 25164879437 - 2⁶ = 25164879373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25164879407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12582439718 + 12582439719.

It is an arithmetic number, because the mean of its divisors is an integer number (12582439719).

Almost surely, 2^25164879437 is an apocalyptic number.

It is an amenable number.

25164879437 is a deficient number, since it is larger than the sum of its proper divisors (1).

25164879437 is an equidigital number, since it uses as much as digits as its factorization.

25164879437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 56.

The spelling of 25164879437 in words is "twenty-five billion, one hundred sixty-four million, eight hundred seventy-nine thousand, four hundred thirty-seven".