126801512643 has 8 divisors (see below), whose sum is σ = 182073966928. Its totient is φ = 78031700064.

The previous prime is 126801512623. The next prime is 126801512647. The reversal of 126801512643 is 346215108621.

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

It is not a de Polignac number, because 126801512643 - 2⁵ = 126801512611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 3251320837 = 126801512643 / (1 + 2 + 6 + 8 + 0 + 1 + 5 + 1 + 2 + 6 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126801512647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1625660380 + ... + 1625660457.

It is an arithmetic number, because the mean of its divisors is an integer number (22759245866).

Almost surely, 2^126801512643 is an apocalyptic number.

126801512643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

126801512643 is a deficient number, since it is larger than the sum of its proper divisors (55272454285).

126801512643 is a wasteful number, since it uses less digits than its factorization.

126801512643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251320853.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 126801512643 in words is "one hundred twenty-six billion, eight hundred one million, five hundred twelve thousand, six hundred forty-three".