128699381692 has 24 divisors (see below), whose sum is σ = 270946067840. Its totient is φ = 52253884080.

The previous prime is 128699381683. The next prime is 128699381731. The reversal of 128699381692 is 296183996821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120957534 + ... + 120958597.

Almost surely, 2^128699381692 is an apocalyptic number.

It is an amenable number.

128699381692 is an abundant number, since it is smaller than the sum of its proper divisors (142246686148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128699381692 is a wasteful number, since it uses less digits than its factorization.

128699381692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241916161 (or 241916159 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 64.

It can be divided in two parts, 1286993 and 81692, that added together give a triangular number (1368685 = T₁₆₅₄).

The spelling of 128699381692 in words is "one hundred twenty-eight billion, six hundred ninety-nine million, three hundred eighty-one thousand, six hundred ninety-two".