64132365621 has 16 divisors (see below), whose sum is σ = 86323636224. Its totient is φ = 42348138864.

The previous prime is 64132365611. The next prime is 64132365631. The reversal of 64132365621 is 12656323146.

It is an interprime number because it is at equal distance from previous prime (64132365611) and next prime (64132365631).

It is not a de Polignac number, because 64132365621 - 2¹⁵ = 64132332853 is a prime.

It is a super-2 number, since 2×64132365621² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64132365621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64132365611) 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, 2420970 + ... + 2447316.

It is an arithmetic number, because the mean of its divisors is an integer number (5395227264).

Almost surely, 2^64132365621 is an apocalyptic number.

It is an amenable number.

64132365621 is a deficient number, since it is larger than the sum of its proper divisors (22191270603).

64132365621 is a wasteful number, since it uses less digits than its factorization.

64132365621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34040.

The product of its digits is 155520, while the sum is 39.

Adding to 64132365621 its reverse (12656323146), we get a palindrome (76788688767).

The spelling of 64132365621 in words is "sixty-four billion, one hundred thirty-two million, three hundred sixty-five thousand, six hundred twenty-one".