64466031421 has 16 divisors (see below), whose sum is σ = 70838712000. Its totient is φ = 58179155200.

The previous prime is 64466031353. The next prime is 64466031457. The reversal of 64466031421 is 12413066446.

It is a cyclic number.

It is not a de Polignac number, because 64466031421 - 2²³ = 64457642813 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 (64466031481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3154725 + ... + 3175093.

It is an arithmetic number, because the mean of its divisors is an integer number (4427419500).

Almost surely, 2^64466031421 is an apocalyptic number.

It is an amenable number.

64466031421 is a deficient number, since it is larger than the sum of its proper divisors (6372680579).

64466031421 is a wasteful number, since it uses less digits than its factorization.

64466031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22460.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 64466031421 its reverse (12413066446), we get a palindrome (76879097867).

The spelling of 64466031421 in words is "sixty-four billion, four hundred sixty-six million, thirty-one thousand, four hundred twenty-one".