25021372738867 has 2 divisors, whose sum is σ = 25021372738868. Its totient is φ = 25021372738866.

The previous prime is 25021372738861. The next prime is 25021372738909. The reversal of 25021372738867 is 76883727312052.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25021372738867 is a prime.

It is not a weakly prime, because it can be changed into another prime (25021372738861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12510686369433 + 12510686369434.

It is an arithmetic number, because the mean of its divisors is an integer number (12510686369434).

Almost surely, 2^{25021372738867} is an apocalyptic number.

25021372738867 is a deficient number, since it is larger than the sum of its proper divisors (1).

25021372738867 is an equidigital number, since it uses as much as digits as its factorization.

25021372738867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47416320, while the sum is 61.

The spelling of 25021372738867 in words is "twenty-five trillion, twenty-one billion, three hundred seventy-two million, seven hundred thirty-eight thousand, eight hundred sixty-seven".