621684827601 has 16 divisors (see below), whose sum is σ = 829499056128. Its totient is φ = 414163688400.

The previous prime is 621684827549. The next prime is 621684827629. The reversal of 621684827601 is 106728486126.

It is not a de Polignac number, because 621684827601 - 2⁶ = 621684827537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621684827651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28212750 + ... + 28234776.

It is an arithmetic number, because the mean of its divisors is an integer number (51843691008).

Almost surely, 2^621684827601 is an apocalyptic number.

It is an amenable number.

621684827601 is a deficient number, since it is larger than the sum of its proper divisors (207814228527).

621684827601 is a wasteful number, since it uses less digits than its factorization.

621684827601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28252.

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 621684827601 in words is "six hundred twenty-one billion, six hundred eighty-four million, eight hundred twenty-seven thousand, six hundred one".