641562499 has 8 divisors (see below), whose sum is σ = 659604608. Its totient is φ = 623557440.

The previous prime is 641562457. The next prime is 641562503. The reversal of 641562499 is 994265146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641562499 - 2¹³ = 641554307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641562409) 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 7 ways as a sum of consecutive naturals, for example, 27919 + ... + 45415.

It is an arithmetic number, because the mean of its divisors is an integer number (82450576).

Almost surely, 2^641562499 is an apocalyptic number.

641562499 is a deficient number, since it is larger than the sum of its proper divisors (18042109).

641562499 is a wasteful number, since it uses less digits than its factorization.

641562499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18525.

The product of its digits is 466560, while the sum is 46.

The square root of 641562499 is about 25329.0840537119. The cubic root of 641562499 is about 862.4746189829.

The spelling of 641562499 in words is "six hundred forty-one million, five hundred sixty-two thousand, four hundred ninety-nine".