1621357068 has 12 divisors (see below), whose sum is σ = 3783166520. Its totient is φ = 540452352.

The previous prime is 1621357043. The next prime is 1621357069. The reversal of 1621357068 is 8607531261.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1621357069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67556533 + ... + 67556556.

Almost surely, 2^1621357068 is an apocalyptic number.

It is an amenable number.

1621357068 is an abundant number, since it is smaller than the sum of its proper divisors (2161809452).

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

1621357068 is a wasteful number, since it uses less digits than its factorization.

1621357068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135113096 (or 135113094 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1621357068 is about 40266.0783787048. The cubic root of 1621357068 is about 1174.7881478323.

The spelling of 1621357068 in words is "one billion, six hundred twenty-one million, three hundred fifty-seven thousand, sixty-eight".