64773851 has 2 divisors, whose sum is σ = 64773852. Its totient is φ = 64773850.

The previous prime is 64773847. The next prime is 64773881. The reversal of 64773851 is 15837746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64773851 - 2² = 64773847 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64773799 and 64773808.

It is not a weakly prime, because it can be changed into another prime (64773881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32386925 + 32386926.

It is an arithmetic number, because the mean of its divisors is an integer number (32386926).

Almost surely, 2^64773851 is an apocalyptic number.

64773851 is a deficient number, since it is larger than the sum of its proper divisors (1).

64773851 is an equidigital number, since it uses as much as digits as its factorization.

64773851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 64773851 is about 8048.2203622913. The cubic root of 64773851 is about 401.6057349957.

The spelling of 64773851 in words is "sixty-four million, seven hundred seventy-three thousand, eight hundred fifty-one".