128161494012 has 24 divisors (see below), whose sum is σ = 299054345296. Its totient is φ = 42718946688.

The previous prime is 128161494011. The next prime is 128161494017. The reversal of 128161494012 is 210494161821.

It is a super-2 number, since 2×128161494012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128161494011) 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, 178998 + ... + 536994.

Almost surely, 2^128161494012 is an apocalyptic number.

128161494012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is a pronic number, being equal to 357996×357997.

It is an amenable number.

128161494012 is an abundant number, since it is smaller than the sum of its proper divisors (170892851284).

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

128161494012 is a wasteful number, since it uses less digits than its factorization.

128161494012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387837 (or 387835 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 128161494012 in words is "one hundred twenty-eight billion, one hundred sixty-one million, four hundred ninety-four thousand, twelve".