77271081 has 16 divisors (see below), whose sum is σ = 109454400. Its totient is φ = 48351168.

The previous prime is 77271071. The next prime is 77271097. The reversal of 77271081 is 18017277.

It is not a de Polignac number, because 77271081 - 2⁵ = 77271049 is a prime.

It is a super-2 number, since 2×77271081² = 11941639917817122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77271031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6 + ... + 12431.

It is an arithmetic number, because the mean of its divisors is an integer number (6840900).

Almost surely, 2^77271081 is an apocalyptic number.

It is an amenable number.

77271081 is a deficient number, since it is larger than the sum of its proper divisors (32183319).

77271081 is a wasteful number, since it uses less digits than its factorization.

77271081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12568.

The product of its (nonzero) digits is 5488, while the sum is 33.

The square root of 77271081 is about 8790.3970900068. The cubic root of 77271081 is about 425.9307509382.

The spelling of 77271081 in words is "seventy-seven million, two hundred seventy-one thousand, eighty-one".