126564894690 has 32 divisors (see below), whose sum is σ = 327121574976. Its totient is φ = 31154435520.

The previous prime is 126564894689. The next prime is 126564894697. The reversal of 126564894690 is 96498465621.

It is a super-2 number, since 2×126564894690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126564894697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162262296 + ... + 162263075.

It is an arithmetic number, because the mean of its divisors is an integer number (10222549218).

Almost surely, 2^126564894690 is an apocalyptic number.

126564894690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126564894690 is an abundant number, since it is smaller than the sum of its proper divisors (200556680286).

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

126564894690 is a wasteful number, since it uses less digits than its factorization.

126564894690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324525394.

The product of its (nonzero) digits is 22394880, while the sum is 60.

The spelling of 126564894690 in words is "one hundred twenty-six billion, five hundred sixty-four million, eight hundred ninety-four thousand, six hundred ninety".