12257378738 has 32 divisors (see below), whose sum is σ = 20413866240. Its totient is φ = 5472706000.

The previous prime is 12257378729. The next prime is 12257378761. The reversal of 12257378738 is 83787375221.

It is a self number, because there is not a number n which added to its sum of digits gives 12257378738.

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, 2036153 + ... + 2042163.

It is an arithmetic number, because the mean of its divisors is an integer number (637933320).

Almost surely, 2^12257378738 is an apocalyptic number.

12257378738 is a deficient number, since it is larger than the sum of its proper divisors (8156487502).

12257378738 is a wasteful number, since it uses less digits than its factorization.

12257378738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7654.

The product of its digits is 3951360, while the sum is 53.

The spelling of 12257378738 in words is "twelve billion, two hundred fifty-seven million, three hundred seventy-eight thousand, seven hundred thirty-eight".