25122161520979 has 2 divisors, whose sum is σ = 25122161520980. Its totient is φ = 25122161520978.

The previous prime is 25122161520943. The next prime is 25122161521001. The reversal of 25122161520979 is 97902516122152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25122161520979 - 2¹³ = 25122161512787 is a prime.

It is a super-2 number, since 2×25122161520979² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25122161520179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12561080760489 + 12561080760490.

It is an arithmetic number, because the mean of its divisors is an integer number (12561080760490).

Almost surely, 2^{25122161520979} is an apocalyptic number.

25122161520979 is a deficient number, since it is larger than the sum of its proper divisors (1).

25122161520979 is an equidigital number, since it uses as much as digits as its factorization.

25122161520979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 25122161520979 in words is "twenty-five trillion, one hundred twenty-two billion, one hundred sixty-one million, five hundred twenty thousand, nine hundred seventy-nine".