81478108 has 6 divisors (see below), whose sum is σ = 142586696. Its totient is φ = 40739052.

The previous prime is 81478087. The next prime is 81478129. The reversal of 81478108 is 80187418.

It is an interprime number because it is at equal distance from previous prime (81478087) and next prime (81478129).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10184760 + ... + 10184767.

Almost surely, 2^81478108 is an apocalyptic number.

It is an amenable number.

81478108 is a deficient number, since it is larger than the sum of its proper divisors (61108588).

81478108 is a wasteful number, since it uses less digits than its factorization.

81478108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20369531 (or 20369529 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 37.

The square root of 81478108 is about 9026.5224754609. The cubic root of 81478108 is about 433.5244992178.

The spelling of 81478108 in words is "eighty-one million, four hundred seventy-eight thousand, one hundred eight".