64078491 has 16 divisors (see below), whose sum is σ = 91403424. Its totient is φ = 39788544.

The previous prime is 64078489. The next prime is 64078501. The reversal of 64078491 is 19487046.

It is a happy number.

It is not a de Polignac number, because 64078491 - 2¹ = 64078489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64078481) 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, 1530 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (5712714).

Almost surely, 2^64078491 is an apocalyptic number.

64078491 is a deficient number, since it is larger than the sum of its proper divisors (27324933).

64078491 is a wasteful number, since it uses less digits than its factorization.

64078491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13070.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 64078491 is about 8004.9041843110. The cubic root of 64078491 is about 400.1634561128.

The spelling of 64078491 in words is "sixty-four million, seventy-eight thousand, four hundred ninety-one".