128040520105051 has 8 divisors (see below), whose sum is σ = 128637011386400. Its totient is φ = 127445414402880.

The previous prime is 128040520105039. The next prime is 128040520105093. The reversal of 128040520105051 is 150501025040821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128040520105051 - 2⁵ = 128040520105019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128040520104998 and 128040520105016.

It is not an unprimeable number, because it can be changed into a prime (128040520105451) 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, 346209546 + ... + 346579183.

It is an arithmetic number, because the mean of its divisors is an integer number (16079626423300).

Almost surely, 2^{128040520105051} is an apocalyptic number.

128040520105051 is a deficient number, since it is larger than the sum of its proper divisors (596491281349).

128040520105051 is an equidigital number, since it uses as much as digits as its factorization.

128040520105051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692789589.

The product of its (nonzero) digits is 16000, while the sum is 34.

Adding to 128040520105051 its reverse (150501025040821), we get a palindrome (278541545145872).

The spelling of 128040520105051 in words is "one hundred twenty-eight trillion, forty billion, five hundred twenty million, one hundred five thousand, fifty-one".