78464477271751 has 2 divisors, whose sum is σ = 78464477271752. Its totient is φ = 78464477271750.

The previous prime is 78464477271749. The next prime is 78464477271787. The reversal of 78464477271751 is 15717277446487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78464477271751 - 2¹ = 78464477271749 is a prime.

Together with 78464477271749, 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 (78464477274751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39232238635875 + 39232238635876.

It is an arithmetic number, because the mean of its divisors is an integer number (39232238635876).

Almost surely, 2^{78464477271751} is an apocalyptic number.

78464477271751 is a deficient number, since it is larger than the sum of its proper divisors (1).

78464477271751 is an equidigital number, since it uses as much as digits as its factorization.

78464477271751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516311040, while the sum is 70.

The spelling of 78464477271751 in words is "seventy-eight trillion, four hundred sixty-four billion, four hundred seventy-seven million, two hundred seventy-one thousand, seven hundred fifty-one".