1331636396512 has 48 divisors (see below), whose sum is σ = 2802824754912. Its totient is φ = 620568391680.

The previous prime is 1331636396491. The next prime is 1331636396561. The reversal of 1331636396512 is 2156936361331.

It is a super-2 number, since 2×1331636396512² (a number of 25 digits) contains 22 as substring.

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, 11826789 + ... + 11938852.

It is an arithmetic number, because the mean of its divisors is an integer number (58392182394).

Almost surely, 2^{1331636396512} is an apocalyptic number.

It is an amenable number.

1331636396512 is an abundant number, since it is smaller than the sum of its proper divisors (1471188358400).

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

1331636396512 is a wasteful number, since it uses less digits than its factorization.

1331636396512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23765771 (or 23765763 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 49.

The spelling of 1331636396512 in words is "one trillion, three hundred thirty-one billion, six hundred thirty-six million, three hundred ninety-six thousand, five hundred twelve".