25025015173 has 2 divisors, whose sum is σ = 25025015174. Its totient is φ = 25025015172.

The previous prime is 25025015137. The next prime is 25025015179. The reversal of 25025015173 is 37151052052.

Together with previous prime (25025015137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23284623649 + 1740391524 = 152593^2 + 41718^2 .

It is a cyclic number.

It is not a de Polignac number, because 25025015173 - 2²¹ = 25022918021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25025015179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12512507586 + 12512507587.

It is an arithmetic number, because the mean of its divisors is an integer number (12512507587).

Almost surely, 2^25025015173 is an apocalyptic number.

It is an amenable number.

25025015173 is a deficient number, since it is larger than the sum of its proper divisors (1).

25025015173 is an equidigital number, since it uses as much as digits as its factorization.

25025015173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The spelling of 25025015173 in words is "twenty-five billion, twenty-five million, fifteen thousand, one hundred seventy-three".