128185777357 has 8 divisors (see below), whose sum is σ = 139841668512. Its totient is φ = 116530326000.

The previous prime is 128185777273. The next prime is 128185777373. The reversal of 128185777357 is 753777581821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-128185777357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128185777295 and 128185777304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128185775357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914718 + ... + 1045504.

It is an arithmetic number, because the mean of its divisors is an integer number (17480208564).

Almost surely, 2^128185777357 is an apocalyptic number.

It is an amenable number.

128185777357 is a deficient number, since it is larger than the sum of its proper divisors (11655891155).

128185777357 is a wasteful number, since it uses less digits than its factorization.

128185777357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219899.

The product of its digits is 23049600, while the sum is 61.

The spelling of 128185777357 in words is "one hundred twenty-eight billion, one hundred eighty-five million, seven hundred seventy-seven thousand, three hundred fifty-seven".