1349665663720 has 64 divisors (see below), whose sum is σ = 3318220650240. Its totient is φ = 489986784000.

The previous prime is 1349665663681. The next prime is 1349665663721. The reversal of 1349665663720 is 273665669431.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1349665663721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2232256 + ... + 2771695.

It is an arithmetic number, because the mean of its divisors is an integer number (51847197660).

Almost surely, 2^{1349665663720} is an apocalyptic number.

1349665663720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1349665663720 is an abundant number, since it is smaller than the sum of its proper divisors (1968554986520).

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

1349665663720 is a wasteful number, since it uses less digits than its factorization.

1349665663720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5004586 (or 5004582 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 58.

The spelling of 1349665663720 in words is "one trillion, three hundred forty-nine billion, six hundred sixty-five million, six hundred sixty-three thousand, seven hundred twenty".