1669544261952 has 56 divisors (see below), whose sum is σ = 5048383843776. Its totient is φ = 477012645888.

The previous prime is 1669544261947. The next prime is 1669544261963. The reversal of 1669544261952 is 2591624459661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621108873 + ... + 621111560.

It is an arithmetic number, because the mean of its divisors is an integer number (90149711496).

Almost surely, 2^{1669544261952} is an apocalyptic number.

1669544261952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1669544261952 is an abundant number, since it is smaller than the sum of its proper divisors (3378839581824).

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

1669544261952 is a wasteful number, since it uses less digits than its factorization.

1669544261952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242220455 (or 1242220445 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 60.

The spelling of 1669544261952 in words is "one trillion, six hundred sixty-nine billion, five hundred forty-four million, two hundred sixty-one thousand, nine hundred fifty-two".