620428990970799 has 20 divisors (see below), whose sum is σ = 926851679004240. Its totient is φ = 413602368130080.

The previous prime is 620428990970783. The next prime is 620428990970801. The reversal of 620428990970799 is 997079099824026.

It is not a de Polignac number, because 620428990970799 - 2⁴ = 620428990970783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620428990970779) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 155041614 + ... + 158992955.

It is an arithmetic number, because the mean of its divisors is an integer number (46342583950212).

Almost surely, 2^{620428990970799} is an apocalyptic number.

620428990970799 is a deficient number, since it is larger than the sum of its proper divisors (306422688033441).

620428990970799 is a wasteful number, since it uses less digits than its factorization.

620428990970799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314058972 (or 314058963 counting only the distinct ones).

The product of its (nonzero) digits is 2222131968, while the sum is 81.

The spelling of 620428990970799 in words is "six hundred twenty trillion, four hundred twenty-eight billion, nine hundred ninety million, nine hundred seventy thousand, seven hundred ninety-nine".