36431738641 has 3 divisors (see below), whose sum is σ = 36431929513. Its totient is φ = 36431547770.

The previous prime is 36431738627. The next prime is 36431738647. The reversal of 36431738641 is 14683713463.

The square root of 36431738641 is 190871.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14683713463 = 29 ⋅506334947.

It is not a de Polignac number, because 36431738641 - 2²¹ = 36429641489 is a prime.

It is a super-2 number, since 2×36431738641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36431738591 and 36431738600.

It is not an unprimeable number, because it can be changed into a prime (36431738647) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 95436 + ... + 286306.

Almost surely, 2^36431738641 is an apocalyptic number.

36431738641 is the 190871-st square number.

36431738641 is the 95436-th centered octagonal number.

It is an amenable number.

36431738641 is a deficient number, since it is larger than the sum of its proper divisors (190872).

36431738641 is an frugal number, since it uses more digits than its factorization.

36431738641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381742 (or 190871 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The spelling of 36431738641 in words is "thirty-six billion, four hundred thirty-one million, seven hundred thirty-eight thousand, six hundred forty-one".