736161637 has 4 divisors (see below), whose sum is σ = 739976140. Its totient is φ = 732347136.

The previous prime is 736161589. The next prime is 736161697.

It is a happy number.

736161637 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 545969956 + 190191681 = 23366^2 + 13791^2 .

It is a cyclic number.

It is not a de Polignac number, because 736161637 - 2¹⁹ = 735637349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 736161637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (736161697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1906962 + ... + 1907347.

It is an arithmetic number, because the mean of its divisors is an integer number (184994035).

Almost surely, 2^736161637 is an apocalyptic number.

It is an amenable number.

736161637 is a deficient number, since it is larger than the sum of its proper divisors (3814503).

736161637 is a wasteful number, since it uses less digits than its factorization.

736161637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814502.

The product of its digits is 95256, while the sum is 40.

The square root of 736161637 is about 27132.2987783933. The cubic root of 736161637 is about 902.9375771113.

The spelling of 736161637 in words is "seven hundred thirty-six million, one hundred sixty-one thousand, six hundred thirty-seven".