2500025277781 has 2 divisors, whose sum is σ = 2500025277782. Its totient is φ = 2500025277780.

The previous prime is 2500025277721. The next prime is 2500025277809. The reversal of 2500025277781 is 1877725200052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2499908832100 + 116445681 = 1581110^2 + 10791^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500025277781 - 2¹¹ = 2500025275733 is a prime.

It is a super-3 number, since 3×2500025277781³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2500025277721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250012638890 + 1250012638891.

It is an arithmetic number, because the mean of its divisors is an integer number (1250012638891).

Almost surely, 2^{2500025277781} is an apocalyptic number.

It is an amenable number.

2500025277781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500025277781 is an equidigital number, since it uses as much as digits as its factorization.

2500025277781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 548800, while the sum is 46.

The spelling of 2500025277781 in words is "two trillion, five hundred billion, twenty-five million, two hundred seventy-seven thousand, seven hundred eighty-one".