81046164 has 12 divisors (see below), whose sum is σ = 189107744. Its totient is φ = 27015384.

The previous prime is 81046151. The next prime is 81046177. The reversal of 81046164 is 46164018.

It is an interprime number because it is at equal distance from previous prime (81046151) and next prime (81046177).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×81046164² = 13136961398229792, 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 3 ways as a sum of consecutive naturals, for example, 3376912 + ... + 3376935.

Almost surely, 2^81046164 is an apocalyptic number.

It is an amenable number.

81046164 is an abundant number, since it is smaller than the sum of its proper divisors (108061580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81046164 is a wasteful number, since it uses less digits than its factorization.

81046164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6753854 (or 6753852 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 81046164 is about 9002.5643013533. The cubic root of 81046164 is about 432.7570530238.

The spelling of 81046164 in words is "eighty-one million, forty-six thousand, one hundred sixty-four".