188045280399 has 8 divisors (see below), whose sum is σ = 263923200640. Its totient is φ = 118765440216.

The previous prime is 188045280383. The next prime is 188045280419. The reversal of 188045280399 is 993082540881.

It is a happy number.

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

It is not a de Polignac number, because 188045280399 - 2⁴ = 188045280383 is a prime.

It is a super-2 number, since 2×188045280399² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 3299040007 = 188045280399 / (1 + 8 + 8 + 0 + 4 + 5 + 2 + 8 + 0 + 3 + 9 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188045280329) 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, 1649519947 + ... + 1649520060.

It is an arithmetic number, because the mean of its divisors is an integer number (32990400080).

Almost surely, 2^188045280399 is an apocalyptic number.

188045280399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

188045280399 is a deficient number, since it is larger than the sum of its proper divisors (75877920241).

188045280399 is a wasteful number, since it uses less digits than its factorization.

188045280399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299040029.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 188045280399 in words is "one hundred eighty-eight billion, forty-five million, two hundred eighty thousand, three hundred ninety-nine".