64253364621 has 32 divisors (see below), whose sum is σ = 87548133120. Its totient is φ = 41907456000.

The previous prime is 64253364607. The next prime is 64253364641. The reversal of 64253364621 is 12646335246.

It is a happy number.

It is not a de Polignac number, because 64253364621 - 2⁷ = 64253364493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64253364601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37334041 + ... + 37335761.

It is an arithmetic number, because the mean of its divisors is an integer number (2735879160).

Almost surely, 2^64253364621 is an apocalyptic number.

It is an amenable number.

64253364621 is a deficient number, since it is larger than the sum of its proper divisors (23294768499).

64253364621 is a wasteful number, since it uses less digits than its factorization.

64253364621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077.

The product of its digits is 622080, while the sum is 42.

Adding to 64253364621 its reverse (12646335246), we get a palindrome (76899699867).

The spelling of 64253364621 in words is "sixty-four billion, two hundred fifty-three million, three hundred sixty-four thousand, six hundred twenty-one".