77044674438 has 48 divisors (see below), whose sum is σ = 169630162416. Its totient is φ = 25267112640.

The previous prime is 77044674437. The next prime is 77044674457. The reversal of 77044674438 is 83447644077.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77044674437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 951220 + ... + 1029032.

It is an arithmetic number, because the mean of its divisors is an integer number (3533961717).

Almost surely, 2^77044674438 is an apocalyptic number.

77044674438 is an abundant number, since it is smaller than the sum of its proper divisors (92585487978).

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

77044674438 is a wasteful number, since it uses less digits than its factorization.

77044674438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78709 (or 78706 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 54.

The spelling of 77044674438 in words is "seventy-seven billion, forty-four million, six hundred seventy-four thousand, four hundred thirty-eight".