128521276724008 has 64 divisors (see below), whose sum is σ = 288982225152000. Its totient is φ = 52391406927552.

The previous prime is 128521276724003. The next prime is 128521276724017. The reversal of 128521276724008 is 800427672125821.

It is a self number, because there is not a number n which added to its sum of digits gives 128521276724008.

It is not an unprimeable number, because it can be changed into a prime (128521276724003) 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, 278494588 + ... + 278955691.

It is an arithmetic number, because the mean of its divisors is an integer number (4515347268000).

Almost surely, 2^{128521276724008} is an apocalyptic number.

It is an amenable number.

128521276724008 is an abundant number, since it is smaller than the sum of its proper divisors (160460948427992).

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

128521276724008 is a wasteful number, since it uses less digits than its factorization.

128521276724008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557450494 (or 557450490 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 55.

The spelling of 128521276724008 in words is "one hundred twenty-eight trillion, five hundred twenty-one billion, two hundred seventy-six million, seven hundred twenty-four thousand, eight".