77123233281 has 8 divisors (see below), whose sum is σ = 102835547680. Its totient is φ = 51413203872.

The previous prime is 77123233217. The next prime is 77123233283. The reversal of 77123233281 is 18233232177.

It is a happy number.

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

It is not a de Polignac number, because 77123233281 - 2⁶ = 77123233217 is a prime.

It is a super-2 number, since 2×77123233281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77123233283) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 490876 + ... + 628653.

It is an arithmetic number, because the mean of its divisors is an integer number (12854443460).

Almost surely, 2^77123233281 is an apocalyptic number.

It is an amenable number.

77123233281 is a deficient number, since it is larger than the sum of its proper divisors (25712314399).

77123233281 is a wasteful number, since it uses less digits than its factorization.

77123233281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142495.

The product of its digits is 84672, while the sum is 39.

The spelling of 77123233281 in words is "seventy-seven billion, one hundred twenty-three million, two hundred thirty-three thousand, two hundred eighty-one".