77481505 has 8 divisors (see below), whose sum is σ = 93045312. Its totient is φ = 61940208.

The previous prime is 77481491. The next prime is 77481539. The reversal of 77481505 is 50518477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77481505 - 2¹⁵ = 77448737 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 3214 + ... + 12856.

It is an arithmetic number, because the mean of its divisors is an integer number (11630664).

Almost surely, 2^77481505 is an apocalyptic number.

It is an amenable number.

77481505 is a deficient number, since it is larger than the sum of its proper divisors (15563807).

77481505 is a wasteful number, since it uses less digits than its factorization.

77481505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11255.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 77481505 is about 8802.3579227387. The cubic root of 77481505 is about 426.3170309355.

The spelling of 77481505 in words is "seventy-seven million, four hundred eighty-one thousand, five hundred five".