77950816449 has 8 divisors (see below), whose sum is σ = 113383005792. Its totient is φ = 47242919040.

The previous prime is 77950816373. The next prime is 77950816483. The reversal of 77950816449 is 94461805977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77950816449 - 2¹⁷ = 77950685377 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77950816392 and 77950816401.

It is not an unprimeable number, because it can be changed into a prime (77950816549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1181072944 + ... + 1181073009.

It is an arithmetic number, because the mean of its divisors is an integer number (14172875724).

Almost surely, 2^77950816449 is an apocalyptic number.

It is an amenable number.

77950816449 is a deficient number, since it is larger than the sum of its proper divisors (35432189343).

77950816449 is a wasteful number, since it uses less digits than its factorization.

77950816449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362145967.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 77950816449 in words is "seventy-seven billion, nine hundred fifty million, eight hundred sixteen thousand, four hundred forty-nine".