2500881601 has 2 divisors, whose sum is σ = 2500881602. Its totient is φ = 2500881600.

The previous prime is 2500881589. The next prime is 2500881619. The reversal of 2500881601 is 1061880052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1472717376 + 1028164225 = 38376^2 + 32065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500881601 - 2¹¹ = 2500879553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2500881641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250440800 + 1250440801.

It is an arithmetic number, because the mean of its divisors is an integer number (1250440801).

Almost surely, 2^2500881601 is an apocalyptic number.

It is an amenable number.

2500881601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500881601 is an equidigital number, since it uses as much as digits as its factorization.

2500881601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 2500881601 is about 50008.8152329167. The cubic root of 2500881601 is about 1357.3683251006.

The spelling of 2500881601 in words is "two billion, five hundred million, eight hundred eighty-one thousand, six hundred one".