620515161 has 40 divisors (see below), whose sum is σ = 1061400384. Its totient is φ = 353898720.

The previous prime is 620515153. The next prime is 620515163. The reversal of 620515161 is 161515026.

It is a happy number.

It is not a de Polignac number, because 620515161 - 2³ = 620515153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (620515163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 532966 + ... + 534128.

Almost surely, 2^620515161 is an apocalyptic number.

It is an amenable number.

620515161 is a deficient number, since it is larger than the sum of its proper divisors (440885223).

620515161 is a wasteful number, since it uses less digits than its factorization.

620515161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123 (or 2114 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 620515161 is about 24910.1417298256. The cubic root of 620515161 is about 852.9380043241.

The spelling of 620515161 in words is "six hundred twenty million, five hundred fifteen thousand, one hundred sixty-one".