128877420031 has 2 divisors, whose sum is σ = 128877420032. Its totient is φ = 128877420030.

The previous prime is 128877419963. The next prime is 128877420079. The reversal of 128877420031 is 130024778821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128877420031 is a prime.

It is a super-2 number, since 2×128877420031² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128877420031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128877421031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64438710015 + 64438710016.

It is an arithmetic number, because the mean of its divisors is an integer number (64438710016).

Almost surely, 2^128877420031 is an apocalyptic number.

128877420031 is a deficient number, since it is larger than the sum of its proper divisors (1).

128877420031 is an equidigital number, since it uses as much as digits as its factorization.

128877420031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 43.

The spelling of 128877420031 in words is "one hundred twenty-eight billion, eight hundred seventy-seven million, four hundred twenty thousand, thirty-one".