25280288133261 has 64 divisors (see below), whose sum is σ = 39090542346240. Its totient is φ = 14234320097280.

The previous prime is 25280288133227. The next prime is 25280288133313. The reversal of 25280288133261 is 16233188208252.

It is not a de Polignac number, because 25280288133261 - 2¹⁸ = 25280287871117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25280288131261) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1582879006 + ... + 1582894976.

It is an arithmetic number, because the mean of its divisors is an integer number (610789724160).

Almost surely, 2^{25280288133261} is an apocalyptic number.

25280288133261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25280288133261 is a deficient number, since it is larger than the sum of its proper divisors (13810254212979).

25280288133261 is a wasteful number, since it uses less digits than its factorization.

25280288133261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19866.

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 25280288133261 in words is "twenty-five trillion, two hundred eighty billion, two hundred eighty-eight million, one hundred thirty-three thousand, two hundred sixty-one".