25603551564441 has 16 divisors (see below), whose sum is σ = 35339582266560. Its totient is φ = 16469088910400.

The previous prime is 25603551564431. The next prime is 25603551564457. The reversal of 25603551564441 is 14446515530652.

It is not a de Polignac number, because 25603551564441 - 2⁶ = 25603551564377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25603551564431) 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, 101284410 + ... + 101536883.

It is an arithmetic number, because the mean of its divisors is an integer number (2208723891660).

Almost surely, 2^{25603551564441} is an apocalyptic number.

It is an amenable number.

25603551564441 is a deficient number, since it is larger than the sum of its proper divisors (9736030702119).

25603551564441 is a wasteful number, since it uses less digits than its factorization.

25603551564441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202822776.

The product of its (nonzero) digits is 8640000, while the sum is 51.

The spelling of 25603551564441 in words is "twenty-five trillion, six hundred three billion, five hundred fifty-one million, five hundred sixty-four thousand, four hundred forty-one".