77926438321 has 8 divisors (see below), whose sum is σ = 79433913600. Its totient is φ = 76420339632.

The previous prime is 77926438319. The next prime is 77926438339. The reversal of 77926438321 is 12383462977.

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

It is a cyclic number.

It is not a de Polignac number, because 77926438321 - 2¹ = 77926438319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77926238321) 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, 229471 + ... + 456628.

It is an arithmetic number, because the mean of its divisors is an integer number (9929239200).

Almost surely, 2^77926438321 is an apocalyptic number.

It is an amenable number.

77926438321 is a deficient number, since it is larger than the sum of its proper divisors (1507475279).

77926438321 is a wasteful number, since it uses less digits than its factorization.

77926438321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688295.

The product of its digits is 3048192, while the sum is 52.

The spelling of 77926438321 in words is "seventy-seven billion, nine hundred twenty-six million, four hundred thirty-eight thousand, three hundred twenty-one".