77724488152 has 8 divisors (see below), whose sum is σ = 145733415300. Its totient is φ = 38862244072.

The previous prime is 77724488137. The next prime is 77724488161. The reversal of 77724488152 is 25188442777.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 77724488093 and 77724488102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4857780502 + ... + 4857780517.

Almost surely, 2^77724488152 is an apocalyptic number.

It is an amenable number.

77724488152 is a deficient number, since it is larger than the sum of its proper divisors (68008927148).

77724488152 is a wasteful number, since it uses less digits than its factorization.

77724488152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9715561025 (or 9715561021 counting only the distinct ones).

The product of its digits is 7024640, while the sum is 55.

The spelling of 77724488152 in words is "seventy-seven billion, seven hundred twenty-four million, four hundred eighty-eight thousand, one hundred fifty-two".