128502626541 has 4 divisors (see below), whose sum is σ = 171336835392. Its totient is φ = 85668417692.

The previous prime is 128502626531. The next prime is 128502626573. The reversal of 128502626541 is 145626205821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128502626541 - 2⁵ = 128502626509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128502626493 and 128502626502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128502626501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21417104421 + ... + 21417104426.

It is an arithmetic number, because the mean of its divisors is an integer number (42834208848).

Almost surely, 2^128502626541 is an apocalyptic number.

It is an amenable number.

128502626541 is a deficient number, since it is larger than the sum of its proper divisors (42834208851).

128502626541 is an equidigital number, since it uses as much as digits as its factorization.

128502626541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42834208850.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 128502626541 in words is "one hundred twenty-eight billion, five hundred two million, six hundred twenty-six thousand, five hundred forty-one".