25387179489 has 40 divisors (see below), whose sum is σ = 44349771840. Its totient is φ = 14169574944.

The previous prime is 25387179473. The next prime is 25387179491. The reversal of 25387179489 is 98497178352.

25387179489 is a `hidden beast` number, since 2 + 5 + 3 + 87 + 1 + 79 + 489 = 666.

It is not a de Polignac number, because 25387179489 - 2⁴ = 25387179473 is a prime.

It is a super-2 number, since 2×25387179489² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (25387179989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 496254 + ... + 545015.

It is an arithmetic number, because the mean of its divisors is an integer number (1108744296).

Almost surely, 2^25387179489 is an apocalyptic number.

It is an amenable number.

25387179489 is a deficient number, since it is larger than the sum of its proper divisors (18962592351).

25387179489 is a wasteful number, since it uses less digits than its factorization.

25387179489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041331 (or 1041322 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The spelling of 25387179489 in words is "twenty-five billion, three hundred eighty-seven million, one hundred seventy-nine thousand, four hundred eighty-nine".