49664578 has 4 divisors (see below), whose sum is σ = 74496870. Its totient is φ = 24832288.

The previous prime is 49664543. The next prime is 49664579. The reversal of 49664578 is 87546694.

49664578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48678529 + 986049 = 6977^2 + 993^2 .

It is not an unprimeable number, because it can be changed into a prime (49664579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12416143 + ... + 12416146.

Almost surely, 2^49664578 is an apocalyptic number.

49664578 is a deficient number, since it is larger than the sum of its proper divisors (24832292).

49664578 is a wasteful number, since it uses less digits than its factorization.

49664578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24832291.

The product of its digits is 1451520, while the sum is 49.

The square root of 49664578 is about 7047.3099832489. The cubic root of 49664578 is about 367.5774973467.

The spelling of 49664578 in words is "forty-nine million, six hundred sixty-four thousand, five hundred seventy-eight".