1621046521452 has 48 divisors (see below), whose sum is σ = 3786803475840. Its totient is φ = 539726084352.

The previous prime is 1621046521447. The next prime is 1621046521483. The reversal of 1621046521452 is 2541256401261.

It is a self number, because there is not a number n which added to its sum of digits gives 1621046521452.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43856443 + ... + 43893389.

It is an arithmetic number, because the mean of its divisors is an integer number (78891739080).

Almost surely, 2^{1621046521452} is an apocalyptic number.

1621046521452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621046521452 is an abundant number, since it is smaller than the sum of its proper divisors (2165756954388).

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

1621046521452 is a wasteful number, since it uses less digits than its factorization.

1621046521452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41070 (or 41068 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 1621046521452 in words is "one trillion, six hundred twenty-one billion, forty-six million, five hundred twenty-one thousand, four hundred fifty-two".