12705880490 has 32 divisors (see below), whose sum is σ = 23666780880. Its totient is φ = 4905531904.

The previous prime is 12705880483. The next prime is 12705880493. The reversal of 12705880490 is 9408850721.

It can be written as a sum of positive squares in 8 ways, for example, as 997991281 + 11707889209 = 31591^2 + 108203^2 .

It is a super-2 number, since 2×12705880490² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12705880493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367942 + ... + 1377198.

Almost surely, 2^12705880490 is an apocalyptic number.

12705880490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12705880490 is a deficient number, since it is larger than the sum of its proper divisors (10960900390).

12705880490 is a wasteful number, since it uses less digits than its factorization.

12705880490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14026.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 12705880490 in words is "twelve billion, seven hundred five million, eight hundred eighty thousand, four hundred ninety".