25503538489 has 16 divisors (see below), whose sum is σ = 30242237760. Its totient is φ = 21201543360.

The previous prime is 25503538471. The next prime is 25503538507. The reversal of 25503538489 is 98483530552.

It is an interprime number because it is at equal distance from previous prime (25503538471) and next prime (25503538507).

It is a cyclic number.

It is not a de Polignac number, because 25503538489 - 2¹¹ = 25503536441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25503538429) 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, 818094 + ... + 848695.

It is an arithmetic number, because the mean of its divisors is an integer number (1890139860).

Almost surely, 2^25503538489 is an apocalyptic number.

It is an amenable number.

25503538489 is a deficient number, since it is larger than the sum of its proper divisors (4738699271).

25503538489 is a wasteful number, since it uses less digits than its factorization.

25503538489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666920.

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 25503538489 in words is "twenty-five billion, five hundred three million, five hundred thirty-eight thousand, four hundred eighty-nine".