12524681778 has 32 divisors (see below), whose sum is σ = 29113067520. Its totient is φ = 3517827600.

The previous prime is 12524681737. The next prime is 12524681789. The reversal of 12524681778 is 87718642521.

It is a happy number.

It is a super-4 number, since 4×12524681778⁴ (a number of 41 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12524681778.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2524698 + ... + 2529653.

It is an arithmetic number, because the mean of its divisors is an integer number (909783360).

Almost surely, 2^12524681778 is an apocalyptic number.

12524681778 is an abundant number, since it is smaller than the sum of its proper divisors (16588385742).

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

12524681778 is a wasteful number, since it uses less digits than its factorization.

12524681778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5054422.

The product of its digits is 1505280, while the sum is 51.

The spelling of 12524681778 in words is "twelve billion, five hundred twenty-four million, six hundred eighty-one thousand, seven hundred seventy-eight".