25015516973 has 2 divisors, whose sum is σ = 25015516974. Its totient is φ = 25015516972.

The previous prime is 25015516931. The next prime is 25015516997. The reversal of 25015516973 is 37961551052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24662189764 + 353327209 = 157042^2 + 18797^2 .

It is a cyclic number.

It is not a de Polignac number, because 25015516973 - 2⁶ = 25015516909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25015516913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12507758486 + 12507758487.

It is an arithmetic number, because the mean of its divisors is an integer number (12507758487).

Almost surely, 2^25015516973 is an apocalyptic number.

It is an amenable number.

25015516973 is a deficient number, since it is larger than the sum of its proper divisors (1).

25015516973 is an equidigital number, since it uses as much as digits as its factorization.

25015516973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 283500, while the sum is 44.

The spelling of 25015516973 in words is "twenty-five billion, fifteen million, five hundred sixteen thousand, nine hundred seventy-three".