620840815957331 has 8 divisors (see below), whose sum is σ = 632211848524800. Its totient is φ = 609557590591560.

The previous prime is 620840815957309. The next prime is 620840815957367. The reversal of 620840815957331 is 133759518048026.

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

It is a cyclic number.

It is not a de Polignac number, because 620840815957331 - 2⁴² = 616442769446227 is a prime.

It is a super-2 number, since 2×620840815957331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620840815927331) 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, 21951786155 + ... + 21951814436.

It is an arithmetic number, because the mean of its divisors is an integer number (79026481065600).

It is a 1-persistent number, because it is pandigital, but 2⋅620840815957331 = 1241681631914662 is not.

Almost surely, 2^{620840815957331} is an apocalyptic number.

620840815957331 is a deficient number, since it is larger than the sum of its proper divisors (11371032567469).

620840815957331 is a wasteful number, since it uses less digits than its factorization.

620840815957331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43903600849.

The product of its (nonzero) digits is 43545600, while the sum is 62.

The spelling of 620840815957331 in words is "six hundred twenty trillion, eight hundred forty billion, eight hundred fifteen million, nine hundred fifty-seven thousand, three hundred thirty-one".