64446861 has 16 divisors (see below), whose sum is σ = 88928768. Its totient is φ = 41472000.

The previous prime is 64446827. The next prime is 64446883. The reversal of 64446861 is 16864446.

It is not a de Polignac number, because 64446861 - 2¹¹ = 64444813 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 (64448861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53061 + ... + 54261.

It is an arithmetic number, because the mean of its divisors is an integer number (5558048).

Almost surely, 2^64446861 is an apocalyptic number.

It is an amenable number.

64446861 is a deficient number, since it is larger than the sum of its proper divisors (24481907).

64446861 is a wasteful number, since it uses less digits than its factorization.

64446861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812.

The product of its digits is 110592, while the sum is 39.

The square root of 64446861 is about 8027.8802307957. The cubic root of 64446861 is about 400.9288020642.

The spelling of 64446861 in words is "sixty-four million, four hundred forty-six thousand, eight hundred sixty-one".