620400165064 has 32 divisors (see below), whose sum is σ = 1188420232320. Its totient is φ = 303492769216.

The previous prime is 620400165029. The next prime is 620400165067. The reversal of 620400165064 is 460561004026.

It is a super-2 number, since 2×620400165064² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (620400165067) 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, 778782 + ... + 1359154.

It is an arithmetic number, because the mean of its divisors is an integer number (37138132260).

Almost surely, 2^620400165064 is an apocalyptic number.

It is an amenable number.

620400165064 is a deficient number, since it is larger than the sum of its proper divisors (568020067256).

620400165064 is a wasteful number, since it uses less digits than its factorization.

620400165064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583269 (or 583265 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 620400165064 in words is "six hundred twenty billion, four hundred million, one hundred sixty-five thousand, sixty-four".