64131220003 has 4 divisors (see below), whose sum is σ = 65622643768. Its totient is φ = 62639796240.

The previous prime is 64131219959. The next prime is 64131220031. The reversal of 64131220003 is 30002213146.

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

It is a cyclic number.

It is not a de Polignac number, because 64131220003 - 2⁹ = 64131219491 is a prime.

It is a super-2 number, since 2×64131220003² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64131220603) 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 3 ways as a sum of consecutive naturals, for example, 745711818 + ... + 745711903.

It is an arithmetic number, because the mean of its divisors is an integer number (16405660942).

Almost surely, 2^64131220003 is an apocalyptic number.

64131220003 is a deficient number, since it is larger than the sum of its proper divisors (1491423765).

64131220003 is a wasteful number, since it uses less digits than its factorization.

64131220003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491423764.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 64131220003 its reverse (30002213146), we get a palindrome (94133433149).

The spelling of 64131220003 in words is "sixty-four billion, one hundred thirty-one million, two hundred twenty thousand, three".