77349555 has 12 divisors (see below), whose sum is σ = 134072640. Its totient is φ = 41253072.

The previous prime is 77349553. The next prime is 77349563. The reversal of 77349555 is 55594377.

It is not a de Polignac number, because 77349555 - 2¹ = 77349553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1718879 = 77349555 / (7 + 7 + 3 + 4 + 9 + 5 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 77349555.

It is not an unprimeable number, because it can be changed into a prime (77349553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 859395 + ... + 859484.

It is an arithmetic number, because the mean of its divisors is an integer number (11172720).

Almost surely, 2^77349555 is an apocalyptic number.

77349555 is a deficient number, since it is larger than the sum of its proper divisors (56723085).

77349555 is a wasteful number, since it uses less digits than its factorization.

77349555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718890 (or 1718887 counting only the distinct ones).

The product of its digits is 661500, while the sum is 45.

The square root of 77349555 is about 8794.8595781854. The cubic root of 77349555 is about 426.0748893004.

The spelling of 77349555 in words is "seventy-seven million, three hundred forty-nine thousand, five hundred fifty-five".