77081552 has 20 divisors (see below), whose sum is σ = 151795716. Its totient is φ = 37908480.

The previous prime is 77081549. The next prime is 77081573. The reversal of 77081552 is 25518077.

It can be written as a sum of positive squares in 2 ways, for example, as 44408896 + 32672656 = 6664^2 + 5716^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38513 + ... + 40464.

Almost surely, 2^77081552 is an apocalyptic number.

It is an amenable number.

77081552 is a deficient number, since it is larger than the sum of its proper divisors (74714164).

77081552 is a wasteful number, since it uses less digits than its factorization.

77081552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79046 (or 79040 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 77081552 is about 8779.6100141179. The cubic root of 77081552 is about 425.5822276201.

The spelling of 77081552 in words is "seventy-seven million, eighty-one thousand, five hundred fifty-two".