25015138486261 has 128 divisors (see below), whose sum is σ = 33928739389440. Its totient is φ = 17854486041600.

The previous prime is 25015138486241. The next prime is 25015138486343. The reversal of 25015138486261 is 16268483151052.

It is not a de Polignac number, because 25015138486261 - 2¹¹ = 25015138484213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25015138486199 and 25015138486208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25015138486201) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8172209671 + ... + 8172212731.

It is an arithmetic number, because the mean of its divisors is an integer number (265068276480).

Almost surely, 2^{25015138486261} is an apocalyptic number.

It is an amenable number.

25015138486261 is a deficient number, since it is larger than the sum of its proper divisors (8913600903179).

25015138486261 is a wasteful number, since it uses less digits than its factorization.

25015138486261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4035.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 25015138486261 in words is "twenty-five trillion, fifteen billion, one hundred thirty-eight million, four hundred eighty-six thousand, two hundred sixty-one".