25200000061 has 2 divisors, whose sum is σ = 25200000062. Its totient is φ = 25200000060.

The previous prime is 25200000053. The next prime is 25200000107. The reversal of 25200000061 is 16000000252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19474202500 + 5725797561 = 139550^2 + 75669^2 .

It is a cyclic number.

It is not a de Polignac number, because 25200000061 - 2³ = 25200000053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25199999990 and 25200000044.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25200004061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12600000030 + 12600000031.

It is an arithmetic number, because the mean of its divisors is an integer number (12600000031).

Almost surely, 2^25200000061 is an apocalyptic number.

It is an amenable number.

25200000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

25200000061 is an equidigital number, since it uses as much as digits as its factorization.

25200000061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The spelling of 25200000061 in words is "twenty-five billion, two hundred million, sixty-one", and thus it is an aban number.