128906611542 has 32 divisors (see below), whose sum is σ = 287743733760. Its totient is φ = 42776181000.

The previous prime is 128906611529. The next prime is 128906611543. The reversal of 128906611542 is 245116609821.

128906611542 is a `hidden beast` number, since 1 + 2 + 8 + 90 + 6 + 6 + 11 + 542 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128906611543) 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, 5340334 + ... + 5364417.

It is an arithmetic number, because the mean of its divisors is an integer number (8991991680).

Almost surely, 2^128906611542 is an apocalyptic number.

128906611542 is an abundant number, since it is smaller than the sum of its proper divisors (158837122218).

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

128906611542 is a wasteful number, since it uses less digits than its factorization.

128906611542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10704985 (or 10704979 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 128906611542 in words is "one hundred twenty-eight billion, nine hundred six million, six hundred eleven thousand, five hundred forty-two".