1621689548716 has 24 divisors (see below), whose sum is σ = 2848525043840. Its totient is φ = 807830537472.

The previous prime is 1621689548711. The next prime is 1621689548749. The reversal of 1621689548716 is 6178459861261.

It is not an unprimeable number, because it can be changed into a prime (1621689548711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567685 + ... + 1888291.

Almost surely, 2^{1621689548716} is an apocalyptic number.

It is an amenable number.

1621689548716 is a deficient number, since it is larger than the sum of its proper divisors (1226835495124).

1621689548716 is a wasteful number, since it uses less digits than its factorization.

1621689548716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321753 (or 1321751 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 64.

The spelling of 1621689548716 in words is "one trillion, six hundred twenty-one billion, six hundred eighty-nine million, five hundred forty-eight thousand, seven hundred sixteen".