3640604236421 has 8 divisors (see below), whose sum is σ = 3703718225184. Its totient is φ = 3577748383440.

The previous prime is 3640604236411. The next prime is 3640604236429. The reversal of 3640604236421 is 1246324060463.

3640604236421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3640604236421 - 2¹⁸ = 3640603974277 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 (3640604236429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64505495 + ... + 64561908.

It is an arithmetic number, because the mean of its divisors is an integer number (462964778148).

Almost surely, 2^{3640604236421} is an apocalyptic number.

It is an amenable number.

3640604236421 is a deficient number, since it is larger than the sum of its proper divisors (63113988763).

3640604236421 is a wasteful number, since it uses less digits than its factorization.

3640604236421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129067891.

The product of its (nonzero) digits is 497664, while the sum is 41.

Adding to 3640604236421 its reverse (1246324060463), we get a palindrome (4886928296884).

The spelling of 3640604236421 in words is "three trillion, six hundred forty billion, six hundred four million, two hundred thirty-six thousand, four hundred twenty-one".