126784880639 has 4 divisors (see below), whose sum is σ = 126789851280. Its totient is φ = 126779910000.

The previous prime is 126784880633. The next prime is 126784880659. The reversal of 126784880639 is 936088487621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126784880639 - 2⁴ = 126784880623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126784880633) 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, 2446862 + ... + 2498139.

It is an arithmetic number, because the mean of its divisors is an integer number (31697462820).

Almost surely, 2^126784880639 is an apocalyptic number.

126784880639 is a deficient number, since it is larger than the sum of its proper divisors (4970641).

126784880639 is an equidigital number, since it uses as much as digits as its factorization.

126784880639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4970640.

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 126784880639 in words is "one hundred twenty-six billion, seven hundred eighty-four million, eight hundred eighty thousand, six hundred thirty-nine".