126872001645 has 8 divisors (see below), whose sum is σ = 202995202656. Its totient is φ = 67665067536.

The previous prime is 126872001617. The next prime is 126872001647. The reversal of 126872001645 is 546100278621.

It is a happy number.

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

It is not a de Polignac number, because 126872001645 - 2⁹ = 126872001133 is a prime.

It is a super-3 number, since 3×126872001645³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126872001597 and 126872001606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126872001647) 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, 4229066707 + ... + 4229066736.

It is an arithmetic number, because the mean of its divisors is an integer number (25374400332).

Almost surely, 2^126872001645 is an apocalyptic number.

126872001645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126872001645 is a deficient number, since it is larger than the sum of its proper divisors (76123201011).

126872001645 is an equidigital number, since it uses as much as digits as its factorization.

126872001645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8458133451.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 126872001645 in words is "one hundred twenty-six billion, eight hundred seventy-two million, one thousand, six hundred forty-five".