25478641386 has 48 divisors (see below), whose sum is σ = 60374122848. Its totient is φ = 7701328800.

The previous prime is 25478641351. The next prime is 25478641403. The reversal of 25478641386 is 68314687452.

It is a happy number.

25478641386 is a `hidden beast` number, since 2 + 547 + 8 + 6 + 4 + 13 + 86 = 666.

It is a super-2 number, since 2×25478641386² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83460 + ... + 240671.

It is an arithmetic number, because the mean of its divisors is an integer number (1257794226).

Almost surely, 2^25478641386 is an apocalyptic number.

25478641386 is an abundant number, since it is smaller than the sum of its proper divisors (34895481462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25478641386 is a wasteful number, since it uses less digits than its factorization.

25478641386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324547 (or 324544 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 25478641386 in words is "twenty-five billion, four hundred seventy-eight million, six hundred forty-one thousand, three hundred eighty-six".