1265668151265 has 128 divisors (see below), whose sum is σ = 2684024709120. Its totient is φ = 553289958144.

The previous prime is 1265668151263. The next prime is 1265668151273. The reversal of 1265668151265 is 5621518665621.

1265668151265 is a `hidden beast` number, since 1 + 2 + 6 + 5 + 6 + 68 + 1 + 512 + 65 = 666.

It is not a de Polignac number, because 1265668151265 - 2¹ = 1265668151263 is a prime.

It is a super-2 number, since 2×1265668151265² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1265668151261) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 163160767 + ... + 163168523.

It is an arithmetic number, because the mean of its divisors is an integer number (20968943040).

Almost surely, 2^{1265668151265} is an apocalyptic number.

1265668151265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265668151265 is an abundant number, since it is smaller than the sum of its proper divisors (1418356557855).

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

1265668151265 is a wasteful number, since it uses less digits than its factorization.

1265668151265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15308 (or 15302 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The spelling of 1265668151265 in words is "one trillion, two hundred sixty-five billion, six hundred sixty-eight million, one hundred fifty-one thousand, two hundred sixty-five".