620025425161 has 4 divisors (see below), whose sum is σ = 656497509012. Its totient is φ = 583553341312.

The previous prime is 620025425111. The next prime is 620025425167. The reversal of 620025425161 is 161524520026.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 439787817225 + 180237607936 = 663165^2 + 424544^2 .

It is not a de Polignac number, because 620025425161 - 2²³ = 620017036553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620025425167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18236041900 + ... + 18236041933.

It is an arithmetic number, because the mean of its divisors is an integer number (164124377253).

Almost surely, 2^620025425161 is an apocalyptic number.

It is an amenable number.

620025425161 is a deficient number, since it is larger than the sum of its proper divisors (36472083851).

620025425161 is a wasteful number, since it uses less digits than its factorization.

620025425161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36472083850.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 620025425161 its reverse (161524520026), we get a palindrome (781549945187).

The spelling of 620025425161 in words is "six hundred twenty billion, twenty-five million, four hundred twenty-five thousand, one hundred sixty-one".