1064816421767 has 6 divisors (see below), whose sum is σ = 1238664000888. Its totient is φ = 912699790044.

The previous prime is 1064816421727. The next prime is 1064816421769. The reversal of 1064816421767 is 7671246184601.

It is not a de Polignac number, because 1064816421767 - 2¹⁰ = 1064816420743 is a prime.

It is a super-2 number, since 2×1064816421767² (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 (1064816421769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10865473643 + ... + 10865473740.

It is an arithmetic number, because the mean of its divisors is an integer number (206444000148).

Almost surely, 2^{1064816421767} is an apocalyptic number.

1064816421767 is a deficient number, since it is larger than the sum of its proper divisors (173847579121).

1064816421767 is an equidigital number, since it uses as much as digits as its factorization.

1064816421767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21730947397 (or 21730947390 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 1064816421767 in words is "one trillion, sixty-four billion, eight hundred sixteen million, four hundred twenty-one thousand, seven hundred sixty-seven".