77481508 has 12 divisors (see below), whose sum is σ = 146022940. Its totient is φ = 35760672.

The previous prime is 77481491. The next prime is 77481539. The reversal of 77481508 is 80518477.

It can be written as a sum of positive squares in 2 ways, for example, as 20358144 + 57123364 = 4512^2 + 7558^2 .

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, 744963 + ... + 745066.

Almost surely, 2^77481508 is an apocalyptic number.

It is an amenable number.

77481508 is a deficient number, since it is larger than the sum of its proper divisors (68541432).

77481508 is a wasteful number, since it uses less digits than its factorization.

77481508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490046 (or 1490044 counting only the distinct ones).

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

The square root of 77481508 is about 8802.3580931475. The cubic root of 77481508 is about 426.3170364376.

The spelling of 77481508 in words is "seventy-seven million, four hundred eighty-one thousand, five hundred eight".