128918348031 has 16 divisors (see below), whose sum is σ = 191878473600. Its totient is φ = 76315300320.

The previous prime is 128918347993. The next prime is 128918348071. The reversal of 128918348031 is 130843819821.

It is a de Polignac number, because none of the positive numbers 2^k-128918348031 is a prime.

It is a super-2 number, since 2×128918348031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128918348071) 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, 45424356 + ... + 45427193.

It is an arithmetic number, because the mean of its divisors is an integer number (11992404600).

Almost surely, 2^128918348031 is an apocalyptic number.

128918348031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128918348031 is a deficient number, since it is larger than the sum of its proper divisors (62960125569).

128918348031 is a wasteful number, since it uses less digits than its factorization.

128918348031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90851606.

The product of its (nonzero) digits is 331776, while the sum is 48.

The spelling of 128918348031 in words is "one hundred twenty-eight billion, nine hundred eighteen million, three hundred forty-eight thousand, thirty-one".