78748024057 has 2 divisors, whose sum is σ = 78748024058. Its totient is φ = 78748024056.

The previous prime is 78748024021. The next prime is 78748024099. The reversal of 78748024057 is 75042084787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50312284416 + 28435739641 = 224304^2 + 168629^2 .

It is an emirp because it is prime and its reverse (75042084787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78748024057 - 2²³ = 78739635449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78748023995 and 78748024013.

It is not a weakly prime, because it can be changed into another prime (78748624057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39374012028 + 39374012029.

It is an arithmetic number, because the mean of its divisors is an integer number (39374012029).

Almost surely, 2^78748024057 is an apocalyptic number.

It is an amenable number.

78748024057 is a deficient number, since it is larger than the sum of its proper divisors (1).

78748024057 is an equidigital number, since it uses as much as digits as its factorization.

78748024057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3512320, while the sum is 52.

The spelling of 78748024057 in words is "seventy-eight billion, seven hundred forty-eight million, twenty-four thousand, fifty-seven".