77954427107 has 2 divisors, whose sum is σ = 77954427108. Its totient is φ = 77954427106.

The previous prime is 77954427043. The next prime is 77954427113. The reversal of 77954427107 is 70172445977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77954427107 - 2⁶ = 77954427043 is a prime.

It is not a weakly prime, because it can be changed into another prime (77954427407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38977213553 + 38977213554.

It is an arithmetic number, because the mean of its divisors is an integer number (38977213554).

Almost surely, 2^77954427107 is an apocalyptic number.

77954427107 is a deficient number, since it is larger than the sum of its proper divisors (1).

77954427107 is an equidigital number, since it uses as much as digits as its factorization.

77954427107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3457440, while the sum is 53.

The spelling of 77954427107 in words is "seventy-seven billion, nine hundred fifty-four million, four hundred twenty-seven thousand, one hundred seven".