620641562 has 4 divisors (see below), whose sum is σ = 930962346. Its totient is φ = 310320780.

The previous prime is 620641561. The next prime is 620641597. The reversal of 620641562 is 265146026.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 451095121 + 169546441 = 21239^2 + 13021^2 .

It is not an unprimeable number, because it can be changed into a prime (620641561) 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 as a sum of consecutive naturals, namely, 155160389 + ... + 155160392.

Almost surely, 2^620641562 is an apocalyptic number.

620641562 is a deficient number, since it is larger than the sum of its proper divisors (310320784).

620641562 is a wasteful number, since it uses less digits than its factorization.

620641562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310320783.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 620641562 is about 24912.6787399509. The cubic root of 620641562 is about 852.9959158272.

Adding to 620641562 its reverse (265146026), we get a palindrome (885787588).

The spelling of 620641562 in words is "six hundred twenty million, six hundred forty-one thousand, five hundred sixty-two".