1264894506888 has 128 divisors (see below), whose sum is σ = 3290554368000. Its totient is φ = 404828686080.

The previous prime is 1264894506833. The next prime is 1264894506917. The reversal of 1264894506888 is 8886054984621.

It is a super-2 number, since 2×1264894506888² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181760353 + ... + 181767311.

It is an arithmetic number, because the mean of its divisors is an integer number (25707456000).

Almost surely, 2^{1264894506888} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1264894506888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645277184000).

1264894506888 is an abundant number, since it is smaller than the sum of its proper divisors (2025659861112).

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

1264894506888 is a wasteful number, since it uses less digits than its factorization.

1264894506888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9675 (or 9671 counting only the distinct ones).

The product of its (nonzero) digits is 212336640, while the sum is 69.

The spelling of 1264894506888 in words is "one trillion, two hundred sixty-four billion, eight hundred ninety-four million, five hundred six thousand, eight hundred eighty-eight".