77734842721472 has 28 divisors (see below), whose sum is σ = 154301166515160. Its totient is φ = 38855808638976.

The previous prime is 77734842721463. The next prime is 77734842721493. The reversal of 77734842721472 is 27412724843777.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77734842721399 and 77734842721408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181232897 + ... + 181661312.

It is an arithmetic number, because the mean of its divisors is an integer number (5510755946970).

Almost surely, 2^{77734842721472} is an apocalyptic number.

It is an amenable number.

77734842721472 is a deficient number, since it is larger than the sum of its proper divisors (76566323793688).

77734842721472 is a wasteful number, since it uses less digits than its factorization.

77734842721472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362897568 (or 362897558 counting only the distinct ones).

The product of its digits is 206524416, while the sum is 65.

The spelling of 77734842721472 in words is "seventy-seven trillion, seven hundred thirty-four billion, eight hundred forty-two million, seven hundred twenty-one thousand, four hundred seventy-two".