2788855591977 has 64 divisors (see below), whose sum is σ = 5209119659520. Its totient is φ = 1435165516800.

The previous prime is 2788855591961. The next prime is 2788855591979. The reversal of 2788855591977 is 7791955588872.

It is not a de Polignac number, because 2788855591977 - 2⁴ = 2788855591961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2788855591896 and 2788855591905.

It is not an unprimeable number, because it can be changed into a prime (2788855591979) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13741524 + ... + 13942997.

It is an arithmetic number, because the mean of its divisors is an integer number (81392494680).

Almost surely, 2^{2788855591977} is an apocalyptic number.

2788855591977 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2788855591977 is a deficient number, since it is larger than the sum of its proper divisors (2420264067543).

2788855591977 is a wasteful number, since it uses less digits than its factorization.

2788855591977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27684591 (or 27684585 counting only the distinct ones).

The product of its digits is 3556224000, while the sum is 81.

The spelling of 2788855591977 in words is "two trillion, seven hundred eighty-eight billion, eight hundred fifty-five million, five hundred ninety-one thousand, nine hundred seventy-seven".