77400732671 has 2 divisors, whose sum is σ = 77400732672. Its totient is φ = 77400732670.

The previous prime is 77400732599. The next prime is 77400732691. The reversal of 77400732671 is 17623700477.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77400732671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77400732691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38700366335 + 38700366336.

It is an arithmetic number, because the mean of its divisors is an integer number (38700366336).

Almost surely, 2^77400732671 is an apocalyptic number.

77400732671 is a deficient number, since it is larger than the sum of its proper divisors (1).

77400732671 is an equidigital number, since it uses as much as digits as its factorization.

77400732671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345744, while the sum is 44.

The spelling of 77400732671 in words is "seventy-seven billion, four hundred million, seven hundred thirty-two thousand, six hundred seventy-one".