64400463 has 12 divisors (see below), whose sum is σ = 95292288. Its totient is φ = 41886240.

The previous prime is 64400449. The next prime is 64400473. The reversal of 64400463 is 36400446.

It is a happy number.

It is not a de Polignac number, because 64400463 - 2¹⁴ = 64384079 is a prime.

It is a super-2 number, since 2×64400463² = 8294839269228738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64400473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86895 + ... + 87632.

It is an arithmetic number, because the mean of its divisors is an integer number (7941024).

Almost surely, 2^64400463 is an apocalyptic number.

64400463 is a deficient number, since it is larger than the sum of its proper divisors (30891825).

64400463 is a wasteful number, since it uses less digits than its factorization.

64400463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174574 (or 174571 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 64400463 is about 8024.9899065357. The cubic root of 64400463 is about 400.8325638081.

The spelling of 64400463 in words is "sixty-four million, four hundred thousand, four hundred sixty-three".