126889506897 has 16 divisors (see below), whose sum is σ = 179348198400. Its totient is φ = 79523580672.

The previous prime is 126889506893. The next prime is 126889506917. The reversal of 126889506897 is 798605988621.

It is not a de Polignac number, because 126889506897 - 2² = 126889506893 is a prime.

It is a super-2 number, since 2×126889506897² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126889506893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1414897 + ... + 1501902.

It is an arithmetic number, because the mean of its divisors is an integer number (11209262400).

Almost surely, 2^126889506897 is an apocalyptic number.

126889506897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

126889506897 is a deficient number, since it is larger than the sum of its proper divisors (52458691503).

126889506897 is a wasteful number, since it uses less digits than its factorization.

126889506897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917672.

The product of its (nonzero) digits is 104509440, while the sum is 69.

The spelling of 126889506897 in words is "one hundred twenty-six billion, eight hundred eighty-nine million, five hundred six thousand, eight hundred ninety-seven".