25461025645544 has 8 divisors (see below), whose sum is σ = 47739423085410. Its totient is φ = 12730512822768.

The previous prime is 25461025645543. The next prime is 25461025645553. The reversal of 25461025645544 is 44554652016452.

It can be written as a sum of positive squares in only one way, i.e., 21411553616644 + 4049472028900 = 4627262^2 + 2012330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (25461025645543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1591314102839 + ... + 1591314102854.

Almost surely, 2^{25461025645544} is an apocalyptic number.

It is an amenable number.

25461025645544 is a deficient number, since it is larger than the sum of its proper divisors (22278397439866).

25461025645544 is a wasteful number, since it uses less digits than its factorization.

25461025645544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182628205699 (or 3182628205695 counting only the distinct ones).

The product of its (nonzero) digits is 23040000, while the sum is 53.

The spelling of 25461025645544 in words is "twenty-five trillion, four hundred sixty-one billion, twenty-five million, six hundred forty-five thousand, five hundred forty-four".