64634744437 has 4 divisors (see below), whose sum is σ = 65730248640. Its totient is φ = 63539240236.

The previous prime is 64634744309. The next prime is 64634744479. The reversal of 64634744437 is 73444743646.

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 64634744437 - 2⁷ = 64634744309 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 (64634744137) 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, 547752013 + ... + 547752130.

It is an arithmetic number, because the mean of its divisors is an integer number (16432562160).

Almost surely, 2^64634744437 is an apocalyptic number.

It is an amenable number.

64634744437 is a deficient number, since it is larger than the sum of its proper divisors (1095504203).

64634744437 is a wasteful number, since it uses less digits than its factorization.

64634744437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095504202.

The product of its digits is 16257024, while the sum is 52.

The spelling of 64634744437 in words is "sixty-four billion, six hundred thirty-four million, seven hundred forty-four thousand, four hundred thirty-seven".