620064515061 has 24 divisors (see below), whose sum is σ = 926308621056. Its totient is φ = 399276630720.

The previous prime is 620064515041. The next prime is 620064515071. The reversal of 620064515061 is 160515460026.

620064515061 is a `hidden beast` number, since 6 + 2 + 0 + 0 + 645 + 1 + 5 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 620064515061 - 2¹⁹ = 620063990773 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620064515041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1978800 + ... + 2270633.

It is an arithmetic number, because the mean of its divisors is an integer number (38596192544).

Almost surely, 2^620064515061 is an apocalyptic number.

It is an amenable number.

620064515061 is a deficient number, since it is larger than the sum of its proper divisors (306244105995).

620064515061 is a wasteful number, since it uses less digits than its factorization.

620064515061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249993 (or 4249990 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 620064515061 its reverse (160515460026), we get a palindrome (780579975087).

The spelling of 620064515061 in words is "six hundred twenty billion, sixty-four million, five hundred fifteen thousand, sixty-one".