77077645 has 8 divisors (see below), whose sum is σ = 93409560. Its totient is φ = 61051200.

The previous prime is 77077633. The next prime is 77077703. The reversal of 77077645 is 54677077.

It can be written as a sum of positive squares in 4 ways, for example, as 50893956 + 26183689 = 7134^2 + 5117^2 .

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

It is not a de Polignac number, because 77077645 - 2⁵ = 77077613 is a prime.

It is a super-3 number, since 3×77077645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75810 + ... + 76819.

It is an arithmetic number, because the mean of its divisors is an integer number (11676195).

Almost surely, 2^77077645 is an apocalyptic number.

It is an amenable number.

77077645 is a deficient number, since it is larger than the sum of its proper divisors (16331915).

77077645 is a wasteful number, since it uses less digits than its factorization.

77077645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152735.

The product of its (nonzero) digits is 288120, while the sum is 43.

The square root of 77077645 is about 8779.3875071100. The cubic root of 77077645 is about 425.5750370632.

The spelling of 77077645 in words is "seventy-seven million, seventy-seven thousand, six hundred forty-five".