77148146 has 4 divisors (see below), whose sum is σ = 115722222. Its totient is φ = 38574072.

The previous prime is 77148131. The next prime is 77148167. The reversal of 77148146 is 64184177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64184177 = 1409 ⋅45553.

It can be written as a sum of positive squares in only one way, i.e., 72063121 + 5085025 = 8489^2 + 2255^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19287035 + ... + 19287038.

Almost surely, 2^77148146 is an apocalyptic number.

77148146 is a deficient number, since it is larger than the sum of its proper divisors (38574076).

77148146 is a wasteful number, since it uses less digits than its factorization.

77148146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38574075.

The product of its digits is 37632, while the sum is 38.

The square root of 77148146 is about 8783.4017328140. The cubic root of 77148146 is about 425.7047518140.

The spelling of 77148146 in words is "seventy-seven million, one hundred forty-eight thousand, one hundred forty-six".