1264894506887 has 8 divisors (see below), whose sum is σ = 1380013156992. Its totient is φ = 1149797230200.

The previous prime is 1264894506833. The next prime is 1264894506917. The reversal of 1264894506887 is 7886054984621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264894506887 is a prime.

It is a super-2 number, since 2×1264894506887² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264894506787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5219483 + ... + 5456444.

It is an arithmetic number, because the mean of its divisors is an integer number (172501644624).

Almost surely, 2^{1264894506887} is an apocalyptic number.

1264894506887 is a deficient number, since it is larger than the sum of its proper divisors (115118650105).

1264894506887 is a wasteful number, since it uses less digits than its factorization.

1264894506887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686709.

The product of its (nonzero) digits is 185794560, while the sum is 68.

The spelling of 1264894506887 in words is "one trillion, two hundred sixty-four billion, eight hundred ninety-four million, five hundred six thousand, eight hundred eighty-seven".