100399444047 has 24 divisors (see below), whose sum is σ = 165830471040. Its totient is φ = 57339366480.

The previous prime is 100399444043. The next prime is 100399444069. The reversal of 100399444047 is 740444993001.

It is not a de Polignac number, because 100399444047 - 2² = 100399444043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100399443993 and 100399444011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100399444043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 325897 + ... + 554082.

It is an arithmetic number, because the mean of its divisors is an integer number (6909602960).

Almost surely, 2^100399444047 is an apocalyptic number.

100399444047 is a deficient number, since it is larger than the sum of its proper divisors (65431026993).

100399444047 is a wasteful number, since it uses less digits than its factorization.

100399444047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881803 (or 881800 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

It can be divided in two parts, 100399 and 444047, that added together give a triangular number (544446 = T₁₀₄₃).

The spelling of 100399444047 in words is "one hundred billion, three hundred ninety-nine million, four hundred forty-four thousand, forty-seven".