126642789534905 has 16 divisors (see below), whose sum is σ = 176127758809344. Its totient is φ = 85617660528960.

The previous prime is 126642789534901. The next prime is 126642789534931. The reversal of 126642789534905 is 509435987246621.

It is not a de Polignac number, because 126642789534905 - 2² = 126642789534901 is a prime.

It is a super-2 number, since 2×126642789534905² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126642789534901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25481444102 + ... + 25481449071.

It is an arithmetic number, because the mean of its divisors is an integer number (11007984925584).

It is a 1-persistent number, because it is pandigital, but 2⋅126642789534905 = 253285579069810 is not.

Almost surely, 2^{126642789534905} is an apocalyptic number.

It is an amenable number.

126642789534905 is a deficient number, since it is larger than the sum of its proper divisors (49484969274439).

126642789534905 is an equidigital number, since it uses as much as digits as its factorization.

126642789534905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50962893256.

The product of its (nonzero) digits is 783820800, while the sum is 71.

The spelling of 126642789534905 in words is "one hundred twenty-six trillion, six hundred forty-two billion, seven hundred eighty-nine million, five hundred thirty-four thousand, nine hundred five".