64403055 has 48 divisors (see below), whose sum is σ = 122316480. Its totient is φ = 31202304.

The previous prime is 64403041. The next prime is 64403071. The reversal of 64403055 is 55030446.

It is not a de Polignac number, because 64403055 - 2⁴ = 64403039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20734 + ... + 23636.

It is an arithmetic number, because the mean of its divisors is an integer number (2548260).

Almost surely, 2^64403055 is an apocalyptic number.

64403055 is a deficient number, since it is larger than the sum of its proper divisors (57913425).

64403055 is a wasteful number, since it uses less digits than its factorization.

64403055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2960 (or 2957 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 64403055 is about 8025.1514004410. The cubic root of 64403055 is about 400.8379413268.

The spelling of 64403055 in words is "sixty-four million, four hundred three thousand, fifty-five".