6451376891 has 2 divisors, whose sum is σ = 6451376892. Its totient is φ = 6451376890.

The previous prime is 6451376879. The next prime is 6451376957. The reversal of 6451376891 is 1986731546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6451376891 - 2²⁶ = 6384268027 is a prime.

It is not a weakly prime, because it can be changed into another prime (6451316891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3225688445 + 3225688446.

It is an arithmetic number, because the mean of its divisors is an integer number (3225688446).

Almost surely, 2^6451376891 is an apocalyptic number.

6451376891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6451376891 is an equidigital number, since it uses as much as digits as its factorization.

6451376891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 6451376891 is about 80320.4637125558. The cubic root of 6451376891 is about 1861.5904316990.

The spelling of 6451376891 in words is "six billion, four hundred fifty-one million, three hundred seventy-six thousand, eight hundred ninety-one".