77481885 has 32 divisors (see below), whose sum is σ = 137128320. Its totient is φ = 37110528.

The previous prime is 77481883. The next prime is 77481889. The reversal of 77481885 is 58818477.

It is not a de Polignac number, because 77481885 - 2¹ = 77481883 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77481883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1846 + ... + 12584.

It is an arithmetic number, because the mean of its divisors is an integer number (4285260).

Almost surely, 2^77481885 is an apocalyptic number.

It is an amenable number.

77481885 is a deficient number, since it is larger than the sum of its proper divisors (59646435).

77481885 is a wasteful number, since it uses less digits than its factorization.

77481885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10797.

The product of its digits is 501760, while the sum is 48.

The square root of 77481885 is about 8802.3795078376. The cubic root of 77481885 is about 426.3177278769.

The spelling of 77481885 in words is "seventy-seven million, four hundred eighty-one thousand, eight hundred eighty-five".