128975641541 has 2 divisors, whose sum is σ = 128975641542. Its totient is φ = 128975641540.

The previous prime is 128975641537. The next prime is 128975641601. The reversal of 128975641541 is 145146579821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123285956641 + 5689684900 = 351121^2 + 75430^2 .

It is a cyclic number.

It is not a de Polignac number, because 128975641541 - 2² = 128975641537 is a prime.

It is a super-2 number, since 2×128975641541² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128975641241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64487820770 + 64487820771.

It is an arithmetic number, because the mean of its divisors is an integer number (64487820771).

Almost surely, 2^128975641541 is an apocalyptic number.

It is an amenable number.

128975641541 is a deficient number, since it is larger than the sum of its proper divisors (1).

128975641541 is an equidigital number, since it uses as much as digits as its factorization.

128975641541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 53.

The spelling of 128975641541 in words is "one hundred twenty-eight billion, nine hundred seventy-five million, six hundred forty-one thousand, five hundred forty-one".