621600005654421 has 16 divisors (see below), whose sum is σ = 830817098517120. Its totient is φ = 413391573080640.

The previous prime is 621600005654413. The next prime is 621600005654461. The reversal of 621600005654421 is 124456500006126.

It is not a de Polignac number, because 621600005654421 - 2³ = 621600005654413 is a prime.

It is a super-3 number, since 3×621600005654421³ (a number of 45 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621600005654461) 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, 7330611 + ... + 36013023.

It is an arithmetic number, because the mean of its divisors is an integer number (51926068657320).

Almost surely, 2^{621600005654421} is an apocalyptic number.

It is an amenable number.

621600005654421 is a deficient number, since it is larger than the sum of its proper divisors (209217092862699).

621600005654421 is a wasteful number, since it uses less digits than its factorization.

621600005654421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28699996.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 621600005654421 in words is "six hundred twenty-one trillion, six hundred billion, five million, six hundred fifty-four thousand, four hundred twenty-one".