64135232641 has 4 divisors (see below), whose sum is σ = 64136845872. Its totient is φ = 64133619412.

The previous prime is 64135232587. The next prime is 64135232657. The reversal of 64135232641 is 14623253146.

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 a cyclic number.

It is not a de Polignac number, because 64135232641 - 2²¹ = 64133135489 is a prime.

It is a super-2 number, since 2×64135232641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64135232641.

It is not an unprimeable number, because it can be changed into a prime (64135232041) 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, 745435 + ... + 827008.

It is an arithmetic number, because the mean of its divisors is an integer number (16034211468).

Almost surely, 2^64135232641 is an apocalyptic number.

It is an amenable number.

64135232641 is a deficient number, since it is larger than the sum of its proper divisors (1613231).

64135232641 is a wasteful number, since it uses less digits than its factorization.

64135232641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613230.

The product of its digits is 103680, while the sum is 37.

Adding to 64135232641 its reverse (14623253146), we get a palindrome (78758485787).

The spelling of 64135232641 in words is "sixty-four billion, one hundred thirty-five million, two hundred thirty-two thousand, six hundred forty-one".