12946655690 has 16 divisors (see below), whose sum is σ = 23872370760. Its totient is φ = 5052353280.

The previous prime is 12946655663. The next prime is 12946655699. The reversal of 12946655690 is 9655664921.

It can be written as a sum of positive squares in 4 ways, for example, as 8372433001 + 4574222689 = 91501^2 + 67633^2 .

It is a super-2 number, since 2×12946655690² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12946655699) 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, 15788195 + ... + 15789014.

Almost surely, 2^12946655690 is an apocalyptic number.

12946655690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12946655690 is a deficient number, since it is larger than the sum of its proper divisors (10925715070).

12946655690 is a wasteful number, since it uses less digits than its factorization.

12946655690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31577257.

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 12946655690 in words is "twelve billion, nine hundred forty-six million, six hundred fifty-five thousand, six hundred ninety".