2805808025778 has 32 divisors (see below), whose sum is σ = 5617440605952. Its totient is φ = 934298755200.

The previous prime is 2805808025767. The next prime is 2805808025809. The reversal of 2805808025778 is 8775208085082.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128219398 + ... + 128241278.

It is an arithmetic number, because the mean of its divisors is an integer number (175545018936).

Almost surely, 2^{2805808025778} is an apocalyptic number.

2805808025778 is an abundant number, since it is smaller than the sum of its proper divisors (2811632580174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2805808025778 is a wasteful number, since it uses less digits than its factorization.

2805808025778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43090.

The product of its (nonzero) digits is 20070400, while the sum is 60.

The spelling of 2805808025778 in words is "two trillion, eight hundred five billion, eight hundred eight million, twenty-five thousand, seven hundred seventy-eight".