2051764907 has 4 divisors (see below), whose sum is σ = 2052191856. Its totient is φ = 2051337960.

The previous prime is 2051764889. The next prime is 2051764997. The reversal of 2051764907 is 7094671502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2051764907 - 2¹⁸ = 2051502763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051764997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206183 + ... + 215904.

It is an arithmetic number, because the mean of its divisors is an integer number (513047964).

Almost surely, 2^2051764907 is an apocalyptic number.

2051764907 is a deficient number, since it is larger than the sum of its proper divisors (426949).

2051764907 is an equidigital number, since it uses as much as digits as its factorization.

2051764907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426948.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 2051764907 is about 45296.4116349187. The cubic root of 2051764907 is about 1270.6985445501.

The spelling of 2051764907 in words is "two billion, fifty-one million, seven hundred sixty-four thousand, nine hundred seven".