25117021622761 has 2 divisors, whose sum is σ = 25117021622762. Its totient is φ = 25117021622760.

The previous prime is 25117021622747. The next prime is 25117021622783. The reversal of 25117021622761 is 16722612071152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17456686734400 + 7660334888361 = 4178120^2 + 2767731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25117021622761 is a prime.

It is not a weakly prime, because it can be changed into another prime (25117021622711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12558510811380 + 12558510811381.

It is an arithmetic number, because the mean of its divisors is an integer number (12558510811381).

Almost surely, 2^{25117021622761} is an apocalyptic number.

It is an amenable number.

25117021622761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25117021622761 is an equidigital number, since it uses as much as digits as its factorization.

25117021622761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 25117021622761 in words is "twenty-five trillion, one hundred seventeen billion, twenty-one million, six hundred twenty-two thousand, seven hundred sixty-one".