128695491036 has 384 divisors, whose sum is σ = 411174973440. Its totient is φ = 34017325056.

The previous prime is 128695490999. The next prime is 128695491101. The reversal of 128695491036 is 630194596821.

128695491036 is a `hidden beast` number, since 1 + 2 + 8 + 69 + 549 + 1 + 0 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 67273216 + ... + 67275128.

It is an arithmetic number, because the mean of its divisors is an integer number (1070768160).

Almost surely, 2^128695491036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128695491036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205587486720).

128695491036 is an abundant number, since it is smaller than the sum of its proper divisors (282479482404).

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

128695491036 is a wasteful number, since it uses less digits than its factorization.

128695491036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082 (or 2074 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 128695491036 in words is "one hundred twenty-eight billion, six hundred ninety-five million, four hundred ninety-one thousand, thirty-six".