12128452169640 has 64 divisors (see below), whose sum is σ = 38525671604160. Its totient is φ = 3044003681280.

The previous prime is 12128452169633. The next prime is 12128452169677. The reversal of 12128452169640 is 4696125482121.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2972657806 + ... + 2972661885.

It is an arithmetic number, because the mean of its divisors is an integer number (601963618815).

Almost surely, 2^{12128452169640} is an apocalyptic number.

12128452169640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12128452169640 is an abundant number, since it is smaller than the sum of its proper divisors (26397219434520).

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

12128452169640 is a wasteful number, since it uses less digits than its factorization.

12128452169640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945319722 (or 5945319718 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 12128452169640 in words is "twelve trillion, one hundred twenty-eight billion, four hundred fifty-two million, one hundred sixty-nine thousand, six hundred forty".