1264485564720 has 480 divisors, whose sum is σ = 5025985316352. Its totient is φ = 278898536448.

The previous prime is 1264485564709. The next prime is 1264485564739. The reversal of 1264485564720 is 274655844621.

1264485564720 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 4 + 8 + 5 + 564 + 72 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17952612 + ... + 18022908.

Almost surely, 2^{1264485564720} is an apocalyptic number.

1264485564720 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 1264485564720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2512992658176).

1264485564720 is an abundant number, since it is smaller than the sum of its proper divisors (3761499751632).

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

1264485564720 is a wasteful number, since it uses less digits than its factorization.

1264485564720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70449 (or 70440 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 54.

The spelling of 1264485564720 in words is "one trillion, two hundred sixty-four billion, four hundred eighty-five million, five hundred sixty-four thousand, seven hundred twenty".