77085481 has 16 divisors (see below), whose sum is σ = 86313600. Its totient is φ = 68252800.

The previous prime is 77085439. The next prime is 77085511. The reversal of 77085481 is 18458077.

It is not a de Polignac number, because 77085481 - 2⁷ = 77085353 is a prime.

It is a super-2 number, since 2×77085481² = 11884342762002722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77085401) 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, 68955 + ... + 70063.

It is an arithmetic number, because the mean of its divisors is an integer number (5394600).

Almost surely, 2^77085481 is an apocalyptic number.

77085481 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

77085481 is a deficient number, since it is larger than the sum of its proper divisors (9228119).

77085481 is a wasteful number, since it uses less digits than its factorization.

77085481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 77085481 is about 8779.8337683580. The cubic root of 77085481 is about 425.5894584214.

The spelling of 77085481 in words is "seventy-seven million, eighty-five thousand, four hundred eighty-one".