12170597650 has 12 divisors (see below), whose sum is σ = 22637311722. Its totient is φ = 4868239040.

The previous prime is 12170597641. The next prime is 12170597669. The reversal of 12170597650 is 5679507121.

It can be written as a sum of positive squares in 3 ways, for example, as 9043439409 + 3127158241 = 95097^2 + 55921^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12170597597 and 12170597606.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121705927 + ... + 121706026.

Almost surely, 2^12170597650 is an apocalyptic number.

12170597650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12170597650 is a deficient number, since it is larger than the sum of its proper divisors (10466714072).

12170597650 is a wasteful number, since it uses less digits than its factorization.

12170597650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243411965 (or 243411960 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 43.

The spelling of 12170597650 in words is "twelve billion, one hundred seventy million, five hundred ninety-seven thousand, six hundred fifty".