623213871428 has 6 divisors (see below), whose sum is σ = 1090624275006. Its totient is φ = 311606935712.

The previous prime is 623213871409. The next prime is 623213871451. The reversal of 623213871428 is 824178312326.

It can be written as a sum of positive squares in only one way, i.e., 573582051904 + 49631819524 = 757352^2 + 222782^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77901733925 + ... + 77901733932.

It is an arithmetic number, because the mean of its divisors is an integer number (181770712501).

Almost surely, 2^623213871428 is an apocalyptic number.

It is an amenable number.

623213871428 is a deficient number, since it is larger than the sum of its proper divisors (467410403578).

623213871428 is a wasteful number, since it uses less digits than its factorization.

623213871428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155803467861 (or 155803467859 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The spelling of 623213871428 in words is "six hundred twenty-three billion, two hundred thirteen million, eight hundred seventy-one thousand, four hundred twenty-eight".