400535161738 has 4 divisors (see below), whose sum is σ = 600802742610. Its totient is φ = 200267580868.

The previous prime is 400535161723. The next prime is 400535161811. The reversal of 400535161738 is 837161535004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 346995217969 + 53539943769 = 589063^2 + 231387^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400535161694 and 400535161703.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 100133790433 + ... + 100133790436.

Almost surely, 2^400535161738 is an apocalyptic number.

400535161738 is a deficient number, since it is larger than the sum of its proper divisors (200267580872).

400535161738 is a wasteful number, since it uses less digits than its factorization.

400535161738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200267580871.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 400535161738 in words is "four hundred billion, five hundred thirty-five million, one hundred sixty-one thousand, seven hundred thirty-eight".