1621621247232 has 108 divisors (see below), whose sum is σ = 5020510540416. Its totient is φ = 463320345600.

The previous prime is 1621621247231. The next prime is 1621621247251. The reversal of 1621621247232 is 2327421261261.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621621247231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21508144 + ... + 21583407.

Almost surely, 2^{1621621247232} is an apocalyptic number.

1621621247232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621621247232 is an abundant number, since it is smaller than the sum of its proper divisors (3398889293184).

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

1621621247232 is an equidigital number, since it uses as much as digits as its factorization.

1621621247232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43091584 (or 43091563 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The spelling of 1621621247232 in words is "one trillion, six hundred twenty-one billion, six hundred twenty-one million, two hundred forty-seven thousand, two hundred thirty-two".