1064517640021 has 4 divisors (see below), whose sum is σ = 1161291970944. Its totient is φ = 967743309100.

The previous prime is 1064517640007. The next prime is 1064517640061. The reversal of 1064517640021 is 1200467154601.

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 1064517640021 - 2¹³ = 1064517631829 is a prime.

It is a super-2 number, since 2×1064517640021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1064517640061) 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, 48387165445 + ... + 48387165466.

It is an arithmetic number, because the mean of its divisors is an integer number (290322992736).

Almost surely, 2^{1064517640021} is an apocalyptic number.

1064517640021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1064517640021 is a deficient number, since it is larger than the sum of its proper divisors (96774330923).

1064517640021 is an equidigital number, since it uses as much as digits as its factorization.

1064517640021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96774330922.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 1064517640021 in words is "one trillion, sixty-four billion, five hundred seventeen million, six hundred forty thousand, twenty-one".