2651216777 has 16 divisors (see below), whose sum is σ = 2916466560. Its totient is φ = 2390064000.

The previous prime is 2651216773. The next prime is 2651216779. The reversal of 2651216777 is 7776121562.

It is a cyclic number.

It is not a de Polignac number, because 2651216777 - 2² = 2651216773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2651216773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1342763 + ... + 1344735.

It is an arithmetic number, because the mean of its divisors is an integer number (182279160).

Almost surely, 2^2651216777 is an apocalyptic number.

It is an amenable number.

2651216777 is a deficient number, since it is larger than the sum of its proper divisors (265249783).

2651216777 is a wasteful number, since it uses less digits than its factorization.

2651216777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944.

The product of its digits is 246960, while the sum is 44.

The square root of 2651216777 is about 51489.9677315883. The cubic root of 2651216777 is about 1384.0392711704.

The spelling of 2651216777 in words is "two billion, six hundred fifty-one million, two hundred sixteen thousand, seven hundred seventy-seven".