3648723991 has 16 divisors (see below), whose sum is σ = 4216481568. Its totient is φ = 3120486400.

The previous prime is 3648723977. The next prime is 3648724003. The reversal of 3648723991 is 1993278463.

It is a cyclic number.

It is not a de Polignac number, because 3648723991 - 2⁵ = 3648723959 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 (3648723931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 770511 + ... + 775231.

It is an arithmetic number, because the mean of its divisors is an integer number (263530098).

Almost surely, 2^3648723991 is an apocalyptic number.

3648723991 is a deficient number, since it is larger than the sum of its proper divisors (567757577).

3648723991 is a wasteful number, since it uses less digits than its factorization.

3648723991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8882.

The product of its digits is 1959552, while the sum is 52.

The square root of 3648723991 is about 60404.6686192384. The cubic root of 3648723991 is about 1539.5022835004.

It can be divided in two parts, 364872 and 3991, that added together give a palindrome (368863).

The spelling of 3648723991 in words is "three billion, six hundred forty-eight million, seven hundred twenty-three thousand, nine hundred ninety-one".