77432381961 has 24 divisors (see below), whose sum is σ = 113532545280. Its totient is φ = 46907884320.

The previous prime is 77432381911. The next prime is 77432381987. The reversal of 77432381961 is 16918323477.

It is a happy number.

It is not a de Polignac number, because 77432381961 - 2¹⁵ = 77432349193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77432381911) 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 23 ways as a sum of consecutive naturals, for example, 791976 + ... + 884358.

It is an arithmetic number, because the mean of its divisors is an integer number (4730522720).

Almost surely, 2^77432381961 is an apocalyptic number.

It is an amenable number.

77432381961 is a deficient number, since it is larger than the sum of its proper divisors (36100163319).

77432381961 is a wasteful number, since it uses less digits than its factorization.

77432381961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94717 (or 94706 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 51.

The spelling of 77432381961 in words is "seventy-seven billion, four hundred thirty-two million, three hundred eighty-one thousand, nine hundred sixty-one".