64631552441 has 4 divisors (see below), whose sum is σ = 64749709392. Its totient is φ = 64513395492.

The previous prime is 64631552429. The next prime is 64631552471. The reversal of 64631552441 is 14425513646.

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 a de Polignac number, because none of the positive numbers 2^k-64631552441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64631552471) 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, 59077655 + ... + 59078748.

It is an arithmetic number, because the mean of its divisors is an integer number (16187427348).

Almost surely, 2^64631552441 is an apocalyptic number.

It is an amenable number.

64631552441 is a deficient number, since it is larger than the sum of its proper divisors (118156951).

64631552441 is a wasteful number, since it uses less digits than its factorization.

64631552441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118156950.

The product of its digits is 345600, while the sum is 41.

The spelling of 64631552441 in words is "sixty-four billion, six hundred thirty-one million, five hundred fifty-two thousand, four hundred forty-one".