77811113442 has 16 divisors (see below), whose sum is σ = 159828233472. Its totient is φ = 25236036720.

The previous prime is 77811113441. The next prime is 77811113449. The reversal of 77811113442 is 24431111877.

It is a super-3 number, since 3×77811113442³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77811113442.

It is not an unprimeable number, because it can be changed into a prime (77811113441) 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, 175250034 + ... + 175250477.

It is an arithmetic number, because the mean of its divisors is an integer number (9989264592).

Almost surely, 2^77811113442 is an apocalyptic number.

77811113442 is an abundant number, since it is smaller than the sum of its proper divisors (82017120030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77811113442 is a wasteful number, since it uses less digits than its factorization.

77811113442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350500553.

The product of its digits is 37632, while the sum is 39.

The spelling of 77811113442 in words is "seventy-seven billion, eight hundred eleven million, one hundred thirteen thousand, four hundred forty-two".