185428993478399 has 8 divisors (see below), whose sum is σ = 204289008117840. Its totient is φ = 166902784408000.

The previous prime is 185428993478341. The next prime is 185428993478437. The reversal of 185428993478399 is 993874399824581.

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

It is a cyclic number.

It is not a de Polignac number, because 185428993478399 - 2²⁴ = 185428976701183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185428993478299) 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, 83451391094 + ... + 83451393315.

It is an arithmetic number, because the mean of its divisors is an integer number (25536126014730).

Almost surely, 2^{185428993478399} is an apocalyptic number.

185428993478399 is a deficient number, since it is larger than the sum of its proper divisors (18860014639441).

185428993478399 is a wasteful number, since it uses less digits than its factorization.

185428993478399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166902784521.

The product of its digits is 33861058560, while the sum is 89.

The spelling of 185428993478399 in words is "one hundred eighty-five trillion, four hundred twenty-eight billion, nine hundred ninety-three million, four hundred seventy-eight thousand, three hundred ninety-nine".