398777783139 has 12 divisors (see below), whose sum is σ = 579461531376. Its totient is φ = 264259927152.

The previous prime is 398777783123. The next prime is 398777783147. The reversal of 398777783139 is 931387777893.

It is not a de Polignac number, because 398777783139 - 2⁴ = 398777783123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398777783639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132659104 + ... + 132662109.

It is an arithmetic number, because the mean of its divisors is an integer number (48288460948).

Almost surely, 2^398777783139 is an apocalyptic number.

398777783139 is a deficient number, since it is larger than the sum of its proper divisors (180683748237).

398777783139 is a wasteful number, since it uses less digits than its factorization.

398777783139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265321386 (or 265321383 counting only the distinct ones).

The product of its digits is 336063168, while the sum is 72.

The spelling of 398777783139 in words is "three hundred ninety-eight billion, seven hundred seventy-seven million, seven hundred eighty-three thousand, one hundred thirty-nine".