77774721140 has 24 divisors (see below), whose sum is σ = 164912616960. Its totient is φ = 30807849888.

The previous prime is 77774721137. The next prime is 77774721151. The reversal of 77774721140 is 4112747777.

It is a super-3 number, since 3×77774721140³ (a number of 34 digits) contains 333 as substring.

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, 18875300 + ... + 18879419.

It is an arithmetic number, because the mean of its divisors is an integer number (6871359040).

Almost surely, 2^77774721140 is an apocalyptic number.

It is an amenable number.

77774721140 is an abundant number, since it is smaller than the sum of its proper divisors (87137895820).

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

77774721140 is a wasteful number, since it uses less digits than its factorization.

77774721140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37754831 (or 37754829 counting only the distinct ones).

The product of its (nonzero) digits is 537824, while the sum is 47.

The spelling of 77774721140 in words is "seventy-seven billion, seven hundred seventy-four million, seven hundred twenty-one thousand, one hundred forty".