77016238477 has 2 divisors, whose sum is σ = 77016238478. Its totient is φ = 77016238476.

The previous prime is 77016238451. The next prime is 77016238487. The reversal of 77016238477 is 77483261077.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62011458441 + 15004780036 = 249021^2 + 122494^2 .

It is a cyclic number.

It is not a de Polignac number, because 77016238477 - 2¹⁹ = 77015714189 is a prime.

It is a super-2 number, since 2×77016238477² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77016238417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38508119238 + 38508119239.

It is an arithmetic number, because the mean of its divisors is an integer number (38508119239).

Almost surely, 2^77016238477 is an apocalyptic number.

It is an amenable number.

77016238477 is a deficient number, since it is larger than the sum of its proper divisors (1).

77016238477 is an equidigital number, since it uses as much as digits as its factorization.

77016238477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2765952, while the sum is 52.

The spelling of 77016238477 in words is "seventy-seven billion, sixteen million, two hundred thirty-eight thousand, four hundred seventy-seven".