64436863446 has 32 divisors (see below), whose sum is σ = 143807620320. Its totient is φ = 21386765952.

The previous prime is 64436863433. The next prime is 64436863459.

64436863446 is a `hidden beast` number, since 64 + 436 + 86 + 34 + 46 = 666.

64436863446 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (64436863433) and next prime (64436863459).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 64436863392 and 64436863401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2548095 + ... + 2573258.

It is an arithmetic number, because the mean of its divisors is an integer number (4493988135).

Almost surely, 2^64436863446 is an apocalyptic number.

64436863446 is an abundant number, since it is smaller than the sum of its proper divisors (79370756874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64436863446 is a wasteful number, since it uses less digits than its factorization.

64436863446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5121597 (or 5121591 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 54.

The spelling of 64436863446 in words is "sixty-four billion, four hundred thirty-six million, eight hundred sixty-three thousand, four hundred forty-six".