1020646344959 has 4 divisors (see below), whose sum is σ = 1025483531640. Its totient is φ = 1015809158280.

The previous prime is 1020646344917. The next prime is 1020646344967. The reversal of 1020646344959 is 9594436460201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020646344959 is a prime.

It is a super-2 number, since 2×1020646344959² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020646344959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020646344059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2418593024 + ... + 2418593445.

It is an arithmetic number, because the mean of its divisors is an integer number (256370882910).

Almost surely, 2^{1020646344959} is an apocalyptic number.

1020646344959 is a deficient number, since it is larger than the sum of its proper divisors (4837186681).

1020646344959 is an equidigital number, since it uses as much as digits as its factorization.

1020646344959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4837186680.

The product of its (nonzero) digits is 5598720, while the sum is 53.

The spelling of 1020646344959 in words is "one trillion, twenty billion, six hundred forty-six million, three hundred forty-four thousand, nine hundred fifty-nine".