64638154 has 24 divisors (see below), whose sum is σ = 113075460. Its totient is φ = 27631296.

The previous prime is 64638143. The next prime is 64638157. The reversal of 64638154 is 45183646.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 58110129 + 6528025 = 7623^2 + 2555^2 .

It is not an unprimeable number, because it can be changed into a prime (64638157) 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, 59932 + ... + 61000.

Almost surely, 2^64638154 is an apocalyptic number.

64638154 is a deficient number, since it is larger than the sum of its proper divisors (48437306).

64638154 is a wasteful number, since it uses less digits than its factorization.

64638154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702 (or 1695 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 64638154 is about 8039.7856936612. The cubic root of 64638154 is about 401.3250929742.

The spelling of 64638154 in words is "sixty-four million, six hundred thirty-eight thousand, one hundred fifty-four".