1331366335640 has 64 divisors (see below), whose sum is σ = 3270107337120. Its totient is φ = 483806080000.

The previous prime is 1331366335639. The next prime is 1331366335643. The reversal of 1331366335640 is 465336631331.

It is a super-2 number, since 2×1331366335640² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1331366335591 and 1331366335600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331366335643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369911 + ... + 1673190.

Almost surely, 2^{1331366335640} is an apocalyptic number.

1331366335640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331366335640 is an abundant number, since it is smaller than the sum of its proper divisors (1938741001480).

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

1331366335640 is a wasteful number, since it uses less digits than its factorization.

1331366335640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044604 (or 2044600 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 44.

The spelling of 1331366335640 in words is "one trillion, three hundred thirty-one billion, three hundred sixty-six million, three hundred thirty-five thousand, six hundred forty".