2677161978 has 24 divisors (see below), whose sum is σ = 6105808800. Its totient is φ = 845419464.

The previous prime is 2677161943. The next prime is 2677161979. The reversal of 2677161978 is 8791617762.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2677161979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3913638 + ... + 3914321.

It is an arithmetic number, because the mean of its divisors is an integer number (254408700).

Almost surely, 2^2677161978 is an apocalyptic number.

2677161978 is an abundant number, since it is smaller than the sum of its proper divisors (3428646822).

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

2677161978 is a wasteful number, since it uses less digits than its factorization.

2677161978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7827986 (or 7827983 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 2677161978 is about 51741.2985728035. The cubic root of 2677161978 is about 1388.5394278031.

The spelling of 2677161978 in words is "two billion, six hundred seventy-seven million, one hundred sixty-one thousand, nine hundred seventy-eight".