1042644361264 has 40 divisors (see below), whose sum is σ = 2204448459840. Its totient is φ = 473783572800.

The previous prime is 1042644361243. The next prime is 1042644361309. The reversal of 1042644361264 is 4621634462401.

It is a super-2 number, since 2×1042644361264² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1042644361264.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335302 + ... + 1482469.

It is an arithmetic number, because the mean of its divisors is an integer number (55111211496).

Almost surely, 2^{1042644361264} is an apocalyptic number.

It is an amenable number.

1042644361264 is an abundant number, since it is smaller than the sum of its proper divisors (1161804098576).

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

1042644361264 is a wasteful number, since it uses less digits than its factorization.

1042644361264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821049 (or 1821043 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 1042644361264 in words is "one trillion, forty-two billion, six hundred forty-four million, three hundred sixty-one thousand, two hundred sixty-four".