25606979069 has 16 divisors (see below), whose sum is σ = 29576588160. Its totient is φ = 21716320320.

The previous prime is 25606979029. The next prime is 25606979077. The reversal of 25606979069 is 96097960652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25606979069 is a prime.

It is a super-2 number, since 2×25606979069² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25606978999 and 25606979017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25606979009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240179 + ... + 329999.

It is an arithmetic number, because the mean of its divisors is an integer number (1848536760).

Almost surely, 2^25606979069 is an apocalyptic number.

It is an amenable number.

25606979069 is a deficient number, since it is larger than the sum of its proper divisors (3969609091).

25606979069 is a wasteful number, since it uses less digits than its factorization.

25606979069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90260.

The product of its (nonzero) digits is 11022480, while the sum is 59.

The spelling of 25606979069 in words is "twenty-five billion, six hundred six million, nine hundred seventy-nine thousand, sixty-nine".