77381224907 has 4 divisors (see below), whose sum is σ = 88435685616. Its totient is φ = 66326764200.

The previous prime is 77381224847. The next prime is 77381224967. The reversal of 77381224907 is 70942218377.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70942218377 = 971 ⋅73060987.

It is an interprime number because it is at equal distance from previous prime (77381224847) and next prime (77381224967).

It is a cyclic number.

It is not a de Polignac number, because 77381224907 - 2⁸ = 77381224651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77381224967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5527230344 + ... + 5527230357.

It is an arithmetic number, because the mean of its divisors is an integer number (22108921404).

Almost surely, 2^77381224907 is an apocalyptic number.

77381224907 is a deficient number, since it is larger than the sum of its proper divisors (11054460709).

77381224907 is a wasteful number, since it uses less digits than its factorization.

77381224907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11054460708.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 77381224907 in words is "seventy-seven billion, three hundred eighty-one million, two hundred twenty-four thousand, nine hundred seven".