77300571961 has 4 divisors (see below), whose sum is σ = 78097485172. Its totient is φ = 76503658752.

The previous prime is 77300571941. The next prime is 77300571979. The reversal of 77300571961 is 16917500377.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48683774736 + 28616797225 = 220644^2 + 169165^2 .

It is a cyclic number.

It is not a de Polignac number, because 77300571961 - 2¹⁹ = 77300047673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77300571911) 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, 398456460 + ... + 398456653.

It is an arithmetic number, because the mean of its divisors is an integer number (19524371293).

Almost surely, 2^77300571961 is an apocalyptic number.

It is an amenable number.

77300571961 is a deficient number, since it is larger than the sum of its proper divisors (796913211).

77300571961 is an equidigital number, since it uses as much as digits as its factorization.

77300571961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796913210.

The product of its (nonzero) digits is 277830, while the sum is 46.

The spelling of 77300571961 in words is "seventy-seven billion, three hundred million, five hundred seventy-one thousand, nine hundred sixty-one".