1265005655652 has 12 divisors (see below), whose sum is σ = 2951679863216. Its totient is φ = 421668551880.

The previous prime is 1265005655629. The next prime is 1265005655687. The reversal of 1265005655652 is 2565565005621.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52708568974 + ... + 52708568997.

Almost surely, 2^{1265005655652} is an apocalyptic number.

1265005655652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1265005655652 is an abundant number, since it is smaller than the sum of its proper divisors (1686674207564).

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

1265005655652 is a wasteful number, since it uses less digits than its factorization.

1265005655652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105417137978 (or 105417137976 counting only the distinct ones).

The product of its (nonzero) digits is 2700000, while the sum is 48.

The spelling of 1265005655652 in words is "one trillion, two hundred sixty-five billion, five million, six hundred fifty-five thousand, six hundred fifty-two".