77741961 has 16 divisors (see below), whose sum is σ = 114121920. Its totient is φ = 46681920.

The previous prime is 77741959. The next prime is 77741971. The reversal of 77741961 is 16914777.

It is not a de Polignac number, because 77741961 - 2¹ = 77741959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77741971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7210 + ... + 14403.

It is an arithmetic number, because the mean of its divisors is an integer number (7132620).

Almost surely, 2^77741961 is an apocalyptic number.

It is an amenable number.

77741961 is a deficient number, since it is larger than the sum of its proper divisors (36379959).

77741961 is a wasteful number, since it uses less digits than its factorization.

77741961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21736.

The product of its digits is 74088, while the sum is 42.

The square root of 77741961 is about 8817.1401826216. The cubic root of 77741961 is about 426.7941884315.

The spelling of 77741961 in words is "seventy-seven million, seven hundred forty-one thousand, nine hundred sixty-one".