126765221647 has 8 divisors (see below), whose sum is σ = 128769685632. Its totient is φ = 124766842200.

The previous prime is 126765221617. The next prime is 126765221711. The reversal of 126765221647 is 746122567621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126765221647 - 2¹⁹ = 126764697359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126765221647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126765221617) 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, 1479129 + ... + 1562482.

It is an arithmetic number, because the mean of its divisors is an integer number (16096210704).

Almost surely, 2^126765221647 is an apocalyptic number.

126765221647 is a deficient number, since it is larger than the sum of its proper divisors (2004463985).

126765221647 is an equidigital number, since it uses as much as digits as its factorization.

126765221647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042269.

The product of its digits is 1693440, while the sum is 49.

The spelling of 126765221647 in words is "one hundred twenty-six billion, seven hundred sixty-five million, two hundred twenty-one thousand, six hundred forty-seven".