1011643421064 has 96 divisors (see below), whose sum is σ = 2729137286400. Its totient is φ = 312147918720.

The previous prime is 1011643421023. The next prime is 1011643421093. The reversal of 1011643421064 is 4601243461101.

It is a super-2 number, since 2×1011643421064² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 891619 + ... + 1678770.

It is an arithmetic number, because the mean of its divisors is an integer number (28428513400).

Almost surely, 2^{1011643421064} is an apocalyptic number.

It is an amenable number.

1011643421064 is an abundant number, since it is smaller than the sum of its proper divisors (1717493865336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011643421064 is a wasteful number, since it uses less digits than its factorization.

1011643421064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570475 (or 2570448 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 1011643421064 its reverse (4601243461101), we get a palindrome (5612886882165).

The spelling of 1011643421064 in words is "one trillion, eleven billion, six hundred forty-three million, four hundred twenty-one thousand, sixty-four".