1621929147320 has 16 divisors (see below), whose sum is σ = 3649340581560. Its totient is φ = 648771658912.

The previous prime is 1621929147313. The next prime is 1621929147341. The reversal of 1621929147320 is 237419291261.

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, 20274114302 + ... + 20274114381.

Almost surely, 2^{1621929147320} is an apocalyptic number.

1621929147320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1621929147320 is an abundant number, since it is smaller than the sum of its proper divisors (2027411434240).

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

1621929147320 is a wasteful number, since it uses less digits than its factorization.

1621929147320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40548228694 (or 40548228690 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 1621929147320 in words is "one trillion, six hundred twenty-one billion, nine hundred twenty-nine million, one hundred forty-seven thousand, three hundred twenty".