1264867651988 has 48 divisors (see below), whose sum is σ = 2264269003920. Its totient is φ = 618033561600.

The previous prime is 1264867651969. The next prime is 1264867652011. The reversal of 1264867651988 is 8891567684621.

It can be written as a sum of positive squares in 8 ways, for example, as 63296521744 + 1201571130244 = 251588^2 + 1096162^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57199478 + ... + 57221586.

It is an arithmetic number, because the mean of its divisors is an integer number (47172270915).

Almost surely, 2^{1264867651988} is an apocalyptic number.

It is an amenable number.

1264867651988 is a deficient number, since it is larger than the sum of its proper divisors (999401351932).

1264867651988 is a wasteful number, since it uses less digits than its factorization.

1264867651988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23228 (or 23226 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 71.

The spelling of 1264867651988 in words is "one trillion, two hundred sixty-four billion, eight hundred sixty-seven million, six hundred fifty-one thousand, nine hundred eighty-eight".