77120356672 has 56 divisors (see below), whose sum is σ = 154657958400. Its totient is φ = 38152429056.

The previous prime is 77120356567. The next prime is 77120356699. The reversal of 77120356672 is 27665302177.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5175729 + ... + 5190607.

Almost surely, 2^77120356672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77120356672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77328979200).

77120356672 is an abundant number, since it is smaller than the sum of its proper divisors (77537601728).

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

77120356672 is a wasteful number, since it uses less digits than its factorization.

77120356672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15743 (or 15733 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 46.

The spelling of 77120356672 in words is "seventy-seven billion, one hundred twenty million, three hundred fifty-six thousand, six hundred seventy-two".