126693131680 has 24 divisors (see below), whose sum is σ = 299312523972. Its totient is φ = 50677252608.

The previous prime is 126693131651. The next prime is 126693131683. The reversal of 126693131680 is 86131396621.

It can be written as a sum of positive squares in 2 ways, for example, as 123479148816 + 3213982864 = 351396^2 + 56692^2 .

It is a super-2 number, since 2×126693131680² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126693131680.

It is not an unprimeable number, because it can be changed into a prime (126693131683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395915877 + ... + 395916196.

Almost surely, 2^126693131680 is an apocalyptic number.

126693131680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126693131680 is an abundant number, since it is smaller than the sum of its proper divisors (172619392292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126693131680 is an equidigital number, since it uses as much as digits as its factorization.

126693131680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791832088 (or 791832080 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 126693131680 in words is "one hundred twenty-six billion, six hundred ninety-three million, one hundred thirty-one thousand, six hundred eighty".