620501161 has 12 divisors (see below), whose sum is σ = 722254980. Its totient is φ = 531528480.

The previous prime is 620501131. The next prime is 620501201. The reversal of 620501161 is 161105026.

It can be written as a sum of positive squares in 2 ways, for example, as 94945536 + 525555625 = 9744^2 + 22925^2 .

It is not a de Polignac number, because 620501161 - 2¹³ = 620492969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620501131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108391 + ... + 113971.

It is an arithmetic number, because the mean of its divisors is an integer number (60187915).

Almost surely, 2^620501161 is an apocalyptic number.

It is an amenable number.

620501161 is a deficient number, since it is larger than the sum of its proper divisors (101753819).

620501161 is a wasteful number, since it uses less digits than its factorization.

620501161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864 (or 7857 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 620501161 is about 24909.8607181975. The cubic root of 620501161 is about 852.9315896424.

Adding to 620501161 its reverse (161105026), we get a palindrome (781606187).

The spelling of 620501161 in words is "six hundred twenty million, five hundred one thousand, one hundred sixty-one".