77545454442 has 16 divisors (see below), whose sum is σ = 158390716032. Its totient is φ = 25298516960.

The previous prime is 77545454419. The next prime is 77545454443. The reversal of 77545454442 is 24445454577.

It is not an unprimeable number, because it can be changed into a prime (77545454443) 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, 137491659 + ... + 137492222.

It is an arithmetic number, because the mean of its divisors is an integer number (9899419752).

Almost surely, 2^77545454442 is an apocalyptic number.

77545454442 is an abundant number, since it is smaller than the sum of its proper divisors (80845261590).

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

77545454442 is a wasteful number, since it uses less digits than its factorization.

77545454442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274983933.

The product of its digits is 12544000, while the sum is 51.

The spelling of 77545454442 in words is "seventy-seven billion, five hundred forty-five million, four hundred fifty-four thousand, four hundred forty-two".