2077749861 has 32 divisors (see below), whose sum is σ = 3068222976. Its totient is φ = 1240200000.

The previous prime is 2077749847. The next prime is 2077749901. The reversal of 2077749861 is 1689477702.

It is not a de Polignac number, because 2077749861 - 2⁵ = 2077749829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2077749361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 637486 + ... + 640736.

It is an arithmetic number, because the mean of its divisors is an integer number (95881968).

Almost surely, 2^2077749861 is an apocalyptic number.

It is an amenable number.

2077749861 is a deficient number, since it is larger than the sum of its proper divisors (990473115).

2077749861 is a wasteful number, since it uses less digits than its factorization.

2077749861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553.

The product of its (nonzero) digits is 1185408, while the sum is 51.

The square root of 2077749861 is about 45582.3415480162. The cubic root of 2077749861 is about 1276.0403884993.

The spelling of 2077749861 in words is "two billion, seventy-seven million, seven hundred forty-nine thousand, eight hundred sixty-one".