78470303881 has 2 divisors, whose sum is σ = 78470303882. Its totient is φ = 78470303880.

The previous prime is 78470303839. The next prime is 78470303897. The reversal of 78470303881 is 18830307487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52971324025 + 25498979856 = 230155^2 + 159684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78470303881 is a prime.

It is a super-2 number, since 2×78470303881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78470303831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39235151940 + 39235151941.

It is an arithmetic number, because the mean of its divisors is an integer number (39235151941).

Almost surely, 2^78470303881 is an apocalyptic number.

It is an amenable number.

78470303881 is a deficient number, since it is larger than the sum of its proper divisors (1).

78470303881 is an equidigital number, since it uses as much as digits as its factorization.

78470303881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 78470303881 in words is "seventy-eight billion, four hundred seventy million, three hundred three thousand, eight hundred eighty-one".