1264661113560 has 256 divisors, whose sum is σ = 4361454720000. Its totient is φ = 290762680320.

The previous prime is 1264661113543. The next prime is 1264661113571. The reversal of 1264661113560 is 653111664621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1803966 + ... + 2404914.

It is an arithmetic number, because the mean of its divisors is an integer number (17036932500).

Almost surely, 2^{1264661113560} is an apocalyptic number.

1264661113560 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 1264661113560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2180727360000).

1264661113560 is an abundant number, since it is smaller than the sum of its proper divisors (3096793606440).

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

1264661113560 is a wasteful number, since it uses less digits than its factorization.

1264661113560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601066 (or 601062 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 1264661113560 in words is "one trillion, two hundred sixty-four billion, six hundred sixty-one million, one hundred thirteen thousand, five hundred sixty".