77544987103 has 2 divisors, whose sum is σ = 77544987104. Its totient is φ = 77544987102.

The previous prime is 77544987101. The next prime is 77544987151. The reversal of 77544987103 is 30178944577.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77544987103 - 2¹ = 77544987101 is a prime.

Together with 77544987101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77544987101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38772493551 + 38772493552.

It is an arithmetic number, because the mean of its divisors is an integer number (38772493552).

Almost surely, 2^77544987103 is an apocalyptic number.

77544987103 is a deficient number, since it is larger than the sum of its proper divisors (1).

77544987103 is an equidigital number, since it uses as much as digits as its factorization.

77544987103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 77544987103 in words is "seventy-seven billion, five hundred forty-four million, nine hundred eighty-seven thousand, one hundred three".