1621023510252 has 24 divisors (see below), whose sum is σ = 3809996867376. Its totient is φ = 536397073408.

The previous prime is 1621023510097. The next prime is 1621023510269. The reversal of 1621023510252 is 2520153201261.

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, 493010373 + ... + 493013660.

It is an arithmetic number, because the mean of its divisors is an integer number (158749869474).

Almost surely, 2^{1621023510252} is an apocalyptic number.

1621023510252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621023510252 is an abundant number, since it is smaller than the sum of its proper divisors (2188973357124).

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

1621023510252 is a wasteful number, since it uses less digits than its factorization.

1621023510252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986024177 (or 986024175 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 1621023510252 in words is "one trillion, six hundred twenty-one billion, twenty-three million, five hundred ten thousand, two hundred fifty-two".