1252005043544 has 8 divisors (see below), whose sum is σ = 2347509456660. Its totient is φ = 626002521768.

The previous prime is 1252005043543. The next prime is 1252005043573. The reversal of 1252005043544 is 4453405002521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1252005043544² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252005043543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78250315214 + ... + 78250315229.

Almost surely, 2^{1252005043544} is an apocalyptic number.

It is an amenable number.

1252005043544 is a deficient number, since it is larger than the sum of its proper divisors (1095504413116).

1252005043544 is a wasteful number, since it uses less digits than its factorization.

1252005043544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156500630449 (or 156500630445 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 1252005043544 in words is "one trillion, two hundred fifty-two billion, five million, forty-three thousand, five hundred forty-four".