126647021705 has 32 divisors (see below), whose sum is σ = 154665987840. Its totient is φ = 99543121920.

The previous prime is 126647021689. The next prime is 126647021717. The reversal of 126647021705 is 507120746621.

It is not a de Polignac number, because 126647021705 - 2⁴ = 126647021689 is a prime.

It is a super-3 number, since 3×126647021705³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41644985 + ... + 41648025.

It is an arithmetic number, because the mean of its divisors is an integer number (4833312120).

Almost surely, 2^126647021705 is an apocalyptic number.

It is an amenable number.

126647021705 is a deficient number, since it is larger than the sum of its proper divisors (28018966135).

126647021705 is a wasteful number, since it uses less digits than its factorization.

126647021705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 126647021705 in words is "one hundred twenty-six billion, six hundred forty-seven million, twenty-one thousand, seven hundred five".