12750621658 has 16 divisors (see below), whose sum is σ = 19283207400. Its totient is φ = 6323014656.

The previous prime is 12750621643. The next prime is 12750621659. The reversal of 12750621658 is 85612605721.

It can be written as a sum of positive squares in 4 ways, for example, as 10802899969 + 1947721689 = 103937^2 + 44133^2 .

It is not an unprimeable number, because it can be changed into a prime (12750621659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168766 + ... + 232342.

Almost surely, 2^12750621658 is an apocalyptic number.

12750621658 is a deficient number, since it is larger than the sum of its proper divisors (6532585742).

12750621658 is a wasteful number, since it uses less digits than its factorization.

12750621658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64401.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 12750621658 in words is "twelve billion, seven hundred fifty million, six hundred twenty-one thousand, six hundred fifty-eight".