77539145 has 8 divisors (see below), whose sum is σ = 93096000. Its totient is φ = 61998640.

The previous prime is 77539139. The next prime is 77539201. The reversal of 77539145 is 54193577.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77539145 - 2⁶ = 77539081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12410 + ... + 17580.

It is an arithmetic number, because the mean of its divisors is an integer number (11637000).

Almost surely, 2^77539145 is an apocalyptic number.

It is an amenable number.

77539145 is a deficient number, since it is larger than the sum of its proper divisors (15556855).

77539145 is a wasteful number, since it uses less digits than its factorization.

77539145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8175.

The product of its digits is 132300, while the sum is 41.

The square root of 77539145 is about 8805.6314367568. The cubic root of 77539145 is about 426.4227199114.

The spelling of 77539145 in words is "seventy-seven million, five hundred thirty-nine thousand, one hundred forty-five".