126889235172 has 216 divisors, whose sum is σ = 389039938560. Its totient is φ = 34726527360.

The previous prime is 126889235171. The next prime is 126889235227. The reversal of 126889235172 is 271532988621.

126889235172 is a `hidden beast` number, since 1 + 26 + 8 + 89 + 23 + 517 + 2 = 666.

It is a super-2 number, since 2×126889235172² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126889235171) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6487047 + ... + 6506577.

Almost surely, 2^126889235172 is an apocalyptic number.

126889235172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126889235172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194519969280).

126889235172 is an abundant number, since it is smaller than the sum of its proper divisors (262150703388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126889235172 is a wasteful number, since it uses less digits than its factorization.

126889235172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19711 (or 19699 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 126889235172 in words is "one hundred twenty-six billion, eight hundred eighty-nine million, two hundred thirty-five thousand, one hundred seventy-two".