77527650077 has 2 divisors, whose sum is σ = 77527650078. Its totient is φ = 77527650076.

The previous prime is 77527650073. The next prime is 77527650089. The reversal of 77527650077 is 77005672577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61295361241 + 16232288836 = 247579^2 + 127406^2 .

It is a cyclic number.

It is not a de Polignac number, because 77527650077 - 2² = 77527650073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77527650073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38763825038 + 38763825039.

It is an arithmetic number, because the mean of its divisors is an integer number (38763825039).

Almost surely, 2^77527650077 is an apocalyptic number.

It is an amenable number.

77527650077 is a deficient number, since it is larger than the sum of its proper divisors (1).

77527650077 is an equidigital number, since it uses as much as digits as its factorization.

77527650077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5042100, while the sum is 53.

The spelling of 77527650077 in words is "seventy-seven billion, five hundred twenty-seven million, six hundred fifty thousand, seventy-seven".