78081081 has 8 divisors (see below), whose sum is σ = 112116480. Its totient is φ = 48049872.

The previous prime is 78081071. The next prime is 78081083. The reversal of 78081081 is 18018087.

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

It is not a de Polignac number, because 78081081 - 2⁵ = 78081049 is a prime.

It is a super-2 number, since 2×78081081² = 12193310420257122, which contains 22 as substring.

78081081 is a modest number, since divided by 81081 gives 78 as remainder.

It is not an unprimeable number, because it can be changed into a prime (78081083) 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, 1001001 + ... + 1001078.

It is an arithmetic number, because the mean of its divisors is an integer number (14014560).

Almost surely, 2^78081081 is an apocalyptic number.

It is an amenable number.

78081081 is a deficient number, since it is larger than the sum of its proper divisors (34035399).

78081081 is a wasteful number, since it uses less digits than its factorization.

78081081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002095.

The product of its (nonzero) digits is 3584, while the sum is 33.

The square root of 78081081 is about 8836.3499817515. The cubic root of 78081081 is about 427.4138645242.

It can be divided in two parts, 7808 and 1081, that multiplied together give a palindrome (8440448).

The spelling of 78081081 in words is "seventy-eight million, eighty-one thousand, eighty-one".