128912611662 has 48 divisors (see below), whose sum is σ = 296865778560. Its totient is φ = 40313999376.

The previous prime is 128912611661. The next prime is 128912611691. The reversal of 128912611662 is 266116219821.

128912611662 is a `hidden beast` number, since 1 + 28 + 9 + 1 + 2 + 611 + 6 + 6 + 2 = 666.

It is a super-2 number, since 2×128912611662² (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 (128912611661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1794568 + ... + 1865019.

It is an arithmetic number, because the mean of its divisors is an integer number (6184703720).

Almost surely, 2^128912611662 is an apocalyptic number.

128912611662 is an abundant number, since it is smaller than the sum of its proper divisors (167953166898).

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

128912611662 is a wasteful number, since it uses less digits than its factorization.

128912611662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659717 (or 3659714 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The spelling of 128912611662 in words is "one hundred twenty-eight billion, nine hundred twelve million, six hundred eleven thousand, six hundred sixty-two".