25541473489 has 45 divisors (see below), whose sum is σ = 31973116077. Its totient is φ = 20344064832.

The previous prime is 25541473457. The next prime is 25541473519. The reversal of 25541473489 is 98437414552.

The square root of 25541473489 is 159817.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 7926875089 + 17614598400 = 89033^2 + 132720^2 .

It is not a de Polignac number, because 25541473489 - 2⁵ = 25541473457 is a prime.

Its product of digits (4838400) is a multiple of the sum of its prime factors (240).

It is not an unprimeable number, because it can be changed into a prime (25541473409) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 323309752 + ... + 323309830.

Almost surely, 2^25541473489 is an apocalyptic number.

25541473489 is the 159817-th square number.

25541473489 is the 79909-th centered octagonal number.

It is an amenable number.

25541473489 is a deficient number, since it is larger than the sum of its proper divisors (6431642588).

25541473489 is an frugal number, since it uses more digits than its factorization.

25541473489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 103 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 52.

The spelling of 25541473489 in words is "twenty-five billion, five hundred forty-one million, four hundred seventy-three thousand, four hundred eighty-nine".