2678897651 has 2 divisors, whose sum is σ = 2678897652. Its totient is φ = 2678897650.

The previous prime is 2678897629. The next prime is 2678897701. The reversal of 2678897651 is 1567988762.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2678897651 is a prime.

It is not a weakly prime, because it can be changed into another prime (2678857651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339448825 + 1339448826.

It is an arithmetic number, because the mean of its divisors is an integer number (1339448826).

Almost surely, 2^2678897651 is an apocalyptic number.

2678897651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2678897651 is an equidigital number, since it uses as much as digits as its factorization.

2678897651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 59.

The square root of 2678897651 is about 51758.0684628010. The cubic root of 2678897651 is about 1388.8394382581.

The spelling of 2678897651 in words is "two billion, six hundred seventy-eight million, eight hundred ninety-seven thousand, six hundred fifty-one".