78485505 has 24 divisors (see below), whose sum is σ = 146080512. Its totient is φ = 35878752.

The previous prime is 78485503. The next prime is 78485507. The reversal of 78485505 is 50558487.

It is an interprime number because it is at equal distance from previous prime (78485503) and next prime (78485507).

It is not a de Polignac number, because 78485505 - 2¹ = 78485503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78485503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52657 + ... + 54126.

It is an arithmetic number, because the mean of its divisors is an integer number (6086688).

Almost surely, 2^78485505 is an apocalyptic number.

It is an amenable number.

78485505 is a deficient number, since it is larger than the sum of its proper divisors (67595007).

78485505 is a wasteful number, since it uses less digits than its factorization.

78485505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106805 (or 106798 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 78485505 is about 8859.2045353971. The cubic root of 78485505 is about 428.1505297082.

The spelling of 78485505 in words is "seventy-eight million, four hundred eighty-five thousand, five hundred five".