1326764651520 has 1408 divisors, whose sum is σ = 5450066952192. Its totient is φ = 269773701120.

The previous prime is 1326764651507. The next prime is 1326764651581. The reversal of 1326764651520 is 251564676231.

It is a tau number, because it is divible by the number of its divisors (1408).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1326764651520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10446965697 + ... + 10446965823.

Almost surely, 2^{1326764651520} is an apocalyptic number.

1326764651520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1326764651520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2725033476096).

1326764651520 is an abundant number, since it is smaller than the sum of its proper divisors (4123302300672).

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

1326764651520 is a wasteful number, since it uses less digits than its factorization.

1326764651520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 1326764651520 in words is "one trillion, three hundred twenty-six billion, seven hundred sixty-four million, six hundred fifty-one thousand, five hundred twenty".