64088721407 has 4 divisors (see below), whose sum is σ = 64157709120. Its totient is φ = 64019733696.

The previous prime is 64088721353. The next prime is 64088721409. The reversal of 64088721407 is 70412788046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64088721407 - 2¹² = 64088717311 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 (64088721409) 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, 34492463 + ... + 34494320.

It is an arithmetic number, because the mean of its divisors is an integer number (16039427280).

Almost surely, 2^64088721407 is an apocalyptic number.

64088721407 is a deficient number, since it is larger than the sum of its proper divisors (68987713).

64088721407 is an equidigital number, since it uses as much as digits as its factorization.

64088721407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68987712.

The product of its (nonzero) digits is 602112, while the sum is 47.

The spelling of 64088721407 in words is "sixty-four billion, eighty-eight million, seven hundred twenty-one thousand, four hundred seven".