77554138 has 8 divisors (see below), whose sum is σ = 116372340. Its totient is φ = 38763360.

The previous prime is 77554133. The next prime is 77554151. The reversal of 77554138 is 83145577.

It can be written as a sum of positive squares in 2 ways, for example, as 69505569 + 8048569 = 8337^2 + 2837^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 77554138.

It is not an unprimeable number, because it can be changed into a prime (77554133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3118 + ... + 12838.

Almost surely, 2^77554138 is an apocalyptic number.

77554138 is a deficient number, since it is larger than the sum of its proper divisors (38818202).

77554138 is a wasteful number, since it uses less digits than its factorization.

77554138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13712.

The product of its digits is 117600, while the sum is 40.

The square root of 77554138 is about 8806.4827258106. The cubic root of 77554138 is about 426.4502025625.

The spelling of 77554138 in words is "seventy-seven million, five hundred fifty-four thousand, one hundred thirty-eight".