73638683977 has 2 divisors, whose sum is σ = 73638683978. Its totient is φ = 73638683976.

The previous prime is 73638683917. The next prime is 73638684019. The reversal of 73638683977 is 77938683637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37409749056 + 36228934921 = 193416^2 + 190339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73638683977 is a prime.

It is not a weakly prime, because it can be changed into another prime (73638683917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36819341988 + 36819341989.

It is an arithmetic number, because the mean of its divisors is an integer number (36819341989).

Almost surely, 2^73638683977 is an apocalyptic number.

It is an amenable number.

73638683977 is a deficient number, since it is larger than the sum of its proper divisors (1).

73638683977 is an equidigital number, since it uses as much as digits as its factorization.

73638683977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192036096, while the sum is 67.

The spelling of 73638683977 in words is "seventy-three billion, six hundred thirty-eight million, six hundred eighty-three thousand, nine hundred seventy-seven".