64071511321 has 8 divisors (see below), whose sum is σ = 66672761760. Its totient is φ = 61520770752.

The previous prime is 64071511241. The next prime is 64071511337. The reversal of 64071511321 is 12311517046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64071511321 - 2¹⁵ = 64071478553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64071511421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12624880 + ... + 12629953.

It is an arithmetic number, because the mean of its divisors is an integer number (8334095220).

Almost surely, 2^64071511321 is an apocalyptic number.

It is an amenable number.

64071511321 is a deficient number, since it is larger than the sum of its proper divisors (2601250439).

64071511321 is a wasteful number, since it uses less digits than its factorization.

64071511321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25254935.

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 64071511321 in words is "sixty-four billion, seventy-one million, five hundred eleven thousand, three hundred twenty-one".