64006790437 has 4 divisors (see below), whose sum is σ = 64328432800. Its totient is φ = 63685148076.

The previous prime is 64006790411. The next prime is 64006790489. The reversal of 64006790437 is 73409760046.

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-64006790437 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 (64006796437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160820883 + ... + 160821280.

It is an arithmetic number, because the mean of its divisors is an integer number (16082108200).

Almost surely, 2^64006790437 is an apocalyptic number.

It is an amenable number.

64006790437 is a deficient number, since it is larger than the sum of its proper divisors (321642363).

64006790437 is a wasteful number, since it uses less digits than its factorization.

64006790437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321642362.

The product of its (nonzero) digits is 762048, while the sum is 46.

The spelling of 64006790437 in words is "sixty-four billion, six million, seven hundred ninety thousand, four hundred thirty-seven".