81078371 has 8 divisors (see below), whose sum is σ = 88896000. Its totient is φ = 73335240.

The previous prime is 81078343. The next prime is 81078383. The reversal of 81078371 is 17387018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81078371 - 2²⁶ = 13969507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81078311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16331 + ... + 20708.

It is an arithmetic number, because the mean of its divisors is an integer number (11112000).

Almost surely, 2^81078371 is an apocalyptic number.

81078371 is a deficient number, since it is larger than the sum of its proper divisors (7817629).

81078371 is a wasteful number, since it uses less digits than its factorization.

81078371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37249.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 81078371 is about 9004.3528917963. The cubic root of 81078371 is about 432.8143699894.

The spelling of 81078371 in words is "eighty-one million, seventy-eight thousand, three hundred seventy-one".