1238664511984 has 40 divisors (see below), whose sum is σ = 2589028822800. Its totient is φ = 571902809088.

The previous prime is 1238664511951. The next prime is 1238664512021. The reversal of 1238664511984 is 4891154668321.

It is a congruent number.

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, 42947034 + ... + 42975865.

It is an arithmetic number, because the mean of its divisors is an integer number (64725720570).

Almost surely, 2^{1238664511984} is an apocalyptic number.

It is an amenable number.

1238664511984 is an abundant number, since it is smaller than the sum of its proper divisors (1350364310816).

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

1238664511984 is a wasteful number, since it uses less digits than its factorization.

1238664511984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85922977 (or 85922971 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 58.

The spelling of 1238664511984 in words is "one trillion, two hundred thirty-eight billion, six hundred sixty-four million, five hundred eleven thousand, nine hundred eighty-four".