1621441055352 has 16 divisors (see below), whose sum is σ = 4053602638440. Its totient is φ = 540480351776.

The previous prime is 1621441055329. The next prime is 1621441055383. The reversal of 1621441055352 is 2535501441261.

It is a self number, because there is not a number n which added to its sum of digits gives 1621441055352.

It is a congruent number.

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, 33780021963 + ... + 33780022010.

Almost surely, 2^{1621441055352} is an apocalyptic number.

1621441055352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621441055352 is an abundant number, since it is smaller than the sum of its proper divisors (2432161583088).

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

1621441055352 is a wasteful number, since it uses less digits than its factorization.

1621441055352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67560043982 (or 67560043978 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 1621441055352 in words is "one trillion, six hundred twenty-one billion, four hundred forty-one million, fifty-five thousand, three hundred fifty-two".