78181485 has 32 divisors (see below), whose sum is σ = 137410560. Its totient is φ = 37781568.

The previous prime is 78181469. The next prime is 78181501. The reversal of 78181485 is 58418187.

It is an interprime number because it is at equal distance from previous prime (78181469) and next prime (78181501).

It is not a de Polignac number, because 78181485 - 2⁴ = 78181469 is a prime.

It is a super-2 number, since 2×78181485² = 12224689193610450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 592 + ... + 12518.

It is an arithmetic number, because the mean of its divisors is an integer number (4294080).

Almost surely, 2^78181485 is an apocalyptic number.

It is an amenable number.

78181485 is a deficient number, since it is larger than the sum of its proper divisors (59229075).

78181485 is a wasteful number, since it uses less digits than its factorization.

78181485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11977.

The product of its digits is 71680, while the sum is 42.

The square root of 78181485 is about 8842.0294616112. The cubic root of 78181485 is about 427.5969890401.

The spelling of 78181485 in words is "seventy-eight million, one hundred eighty-one thousand, four hundred eighty-five".