736641813 has 4 divisors (see below), whose sum is σ = 982189088. Its totient is φ = 491094540.

The previous prime is 736641749. The next prime is 736641817. The reversal of 736641813 is 318146637.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 736641813 - 2⁶ = 736641749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (736641817) 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, 122773633 + ... + 122773638.

It is an arithmetic number, because the mean of its divisors is an integer number (245547272).

Almost surely, 2^736641813 is an apocalyptic number.

It is an amenable number.

736641813 is a deficient number, since it is larger than the sum of its proper divisors (245547275).

736641813 is a wasteful number, since it uses less digits than its factorization.

736641813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245547274.

The product of its digits is 72576, while the sum is 39.

The square root of 736641813 is about 27141.1461253942. The cubic root of 736641813 is about 903.1338540784.

The spelling of 736641813 in words is "seven hundred thirty-six million, six hundred forty-one thousand, eight hundred thirteen".