620161777169 has 4 divisors (see below), whose sum is σ = 676540120560. Its totient is φ = 563783433780.

The previous prime is 620161777133. The next prime is 620161777177. The reversal of 620161777169 is 961777161026.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 620161777169 - 2²⁸ = 619893341713 is a prime.

It is a super-2 number, since 2×620161777169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 620161777169.

It is not an unprimeable number, because it can be changed into a prime (620161777769) 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, 28189171679 + ... + 28189171700.

It is an arithmetic number, because the mean of its divisors is an integer number (169135030140).

Almost surely, 2^620161777169 is an apocalyptic number.

It is an amenable number.

620161777169 is a deficient number, since it is larger than the sum of its proper divisors (56378343391).

620161777169 is a wasteful number, since it uses less digits than its factorization.

620161777169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56378343390.

The product of its (nonzero) digits is 1333584, while the sum is 53.

The spelling of 620161777169 in words is "six hundred twenty billion, one hundred sixty-one million, seven hundred seventy-seven thousand, one hundred sixty-nine".