620168639999 has 4 divisors (see below), whose sum is σ = 647132493936. Its totient is φ = 593204786064.

The previous prime is 620168639983. The next prime is 620168640001. The reversal of 620168639999 is 999936861026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999936861026 = 2 ⋅499968430513.

It is a cyclic number.

It is not a de Polignac number, because 620168639999 - 2⁴ = 620168639983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620168639099) 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, 13481926934 + ... + 13481926979.

It is an arithmetic number, because the mean of its divisors is an integer number (161783123484).

Almost surely, 2^620168639999 is an apocalyptic number.

620168639999 is a deficient number, since it is larger than the sum of its proper divisors (26963853937).

620168639999 is a wasteful number, since it uses less digits than its factorization.

620168639999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26963853936.

The product of its (nonzero) digits is 68024448, while the sum is 68.

The spelling of 620168639999 in words is "six hundred twenty billion, one hundred sixty-eight million, six hundred thirty-nine thousand, nine hundred ninety-nine".