78877755 has 24 divisors (see below), whose sum is σ = 149151600. Its totient is φ = 38243520.

The previous prime is 78877699. The next prime is 78877801. The reversal of 78877755 is 55777887.

It is not a de Polignac number, because 78877755 - 2⁶ = 78877691 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79180 + ... + 80169.

It is an arithmetic number, because the mean of its divisors is an integer number (6214650).

Almost surely, 2^78877755 is an apocalyptic number.

78877755 is a deficient number, since it is larger than the sum of its proper divisors (70273845).

78877755 is a wasteful number, since it uses less digits than its factorization.

78877755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159371 (or 159368 counting only the distinct ones).

The product of its digits is 3841600, while the sum is 54.

The square root of 78877755 is about 8881.3149364269. The cubic root of 78877755 is about 428.8626061726.

The spelling of 78877755 in words is "seventy-eight million, eight hundred seventy-seven thousand, seven hundred fifty-five".