620531561406 has 8 divisors (see below), whose sum is σ = 1241063122824. Its totient is φ = 206843853800.

The previous prime is 620531561393. The next prime is 620531561407. The reversal of 620531561406 is 604165135026.

It is a sphenic number, since it is the product of 3 distinct primes.

620531561406 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620531561407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51710963445 + ... + 51710963456.

It is an arithmetic number, because the mean of its divisors is an integer number (155132890353).

Almost surely, 2^620531561406 is an apocalyptic number.

620531561406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

620531561406 is a wasteful number, since it uses less digits than its factorization.

620531561406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103421926906.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 620531561406 in words is "six hundred twenty billion, five hundred thirty-one million, five hundred sixty-one thousand, four hundred six".