77446672937 has 2 divisors, whose sum is σ = 77446672938. Its totient is φ = 77446672936.

The previous prime is 77446672909. The next prime is 77446672957. The reversal of 77446672937 is 73927664477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73663930921 + 3782742016 = 271411^2 + 61504^2 .

It is an emirp because it is prime and its reverse (73927664477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77446672937 - 2¹² = 77446668841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77446672937.

It is not a weakly prime, because it can be changed into another prime (77446672957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38723336468 + 38723336469.

It is an arithmetic number, because the mean of its divisors is an integer number (38723336469).

Almost surely, 2^77446672937 is an apocalyptic number.

It is an amenable number.

77446672937 is a deficient number, since it is larger than the sum of its proper divisors (1).

77446672937 is an equidigital number, since it uses as much as digits as its factorization.

77446672937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74680704, while the sum is 62.

The spelling of 77446672937 in words is "seventy-seven billion, four hundred forty-six million, six hundred seventy-two thousand, nine hundred thirty-seven".