2077779478 has 32 divisors (see below), whose sum is σ = 3250865664. Its totient is φ = 995297952.

The previous prime is 2077779469. The next prime is 2077779503. The reversal of 2077779478 is 8749777702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1088601 + ... + 1090507.

It is an arithmetic number, because the mean of its divisors is an integer number (101589552).

Almost surely, 2^2077779478 is an apocalyptic number.

2077779478 is a deficient number, since it is larger than the sum of its proper divisors (1173086186).

2077779478 is a wasteful number, since it uses less digits than its factorization.

2077779478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196.

The product of its (nonzero) digits is 9680832, while the sum is 58.

The square root of 2077779478 is about 45582.6664204717. Note that the first 3 decimals coincide. The cubic root of 2077779478 is about 1276.0464515179.

The spelling of 2077779478 in words is "two billion, seventy-seven million, seven hundred seventy-nine thousand, four hundred seventy-eight".