77148655 has 16 divisors (see below), whose sum is σ = 94755744. Its totient is φ = 60278400.

The previous prime is 77148653. The next prime is 77148689. The reversal of 77148655 is 55684177.

It is not a de Polignac number, because 77148655 - 2¹ = 77148653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77148653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72880 + ... + 73930.

It is an arithmetic number, because the mean of its divisors is an integer number (5922234).

Almost surely, 2^77148655 is an apocalyptic number.

77148655 is a deficient number, since it is larger than the sum of its proper divisors (17607089).

77148655 is a wasteful number, since it uses less digits than its factorization.

77148655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its digits is 235200, while the sum is 43.

The square root of 77148655 is about 8783.4307078726. The cubic root of 77148655 is about 425.7056880354.

The spelling of 77148655 in words is "seventy-seven million, one hundred forty-eight thousand, six hundred fifty-five".