2051656699 has 2 divisors, whose sum is σ = 2051656700. Its totient is φ = 2051656698.

The previous prime is 2051656693. The next prime is 2051656729. The reversal of 2051656699 is 9966561502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2051656699 - 2⁵ = 2051656667 is a prime.

It is not a weakly prime, because it can be changed into another prime (2051656693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025828349 + 1025828350.

It is an arithmetic number, because the mean of its divisors is an integer number (1025828350).

Almost surely, 2^2051656699 is an apocalyptic number.

2051656699 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051656699 is an equidigital number, since it uses as much as digits as its factorization.

2051656699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 874800, while the sum is 49.

The square root of 2051656699 is about 45295.2171757681. The cubic root of 2051656699 is about 1270.6762057066.

The spelling of 2051656699 in words is "two billion, fifty-one million, six hundred fifty-six thousand, six hundred ninety-nine".