12819525478 has 16 divisors (see below), whose sum is σ = 20506908240. Its totient is φ = 5989314816.

The previous prime is 12819525469. The next prime is 12819525491. The reversal of 12819525478 is 87452591821.

It is a super-2 number, since 2×12819525478² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351551 + ... + 1361002.

It is an arithmetic number, because the mean of its divisors is an integer number (1281681765).

Almost surely, 2^12819525478 is an apocalyptic number.

12819525478 is a deficient number, since it is larger than the sum of its proper divisors (7687382762).

12819525478 is a wasteful number, since it uses less digits than its factorization.

12819525478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712711.

The product of its digits is 1612800, while the sum is 52.

The spelling of 12819525478 in words is "twelve billion, eight hundred nineteen million, five hundred twenty-five thousand, four hundred seventy-eight".