77774721141 has 16 divisors (see below), whose sum is σ = 111682771200. Its totient is φ = 47858688960.

The previous prime is 77774721137. The next prime is 77774721151. The reversal of 77774721141 is 14112747777.

It is not a de Polignac number, because 77774721141 - 2² = 77774721137 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77774721151) 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 15 ways as a sum of consecutive naturals, for example, 826996 + ... + 916226.

It is an arithmetic number, because the mean of its divisors is an integer number (6980173200).

Almost surely, 2^77774721141 is an apocalyptic number.

It is an amenable number.

77774721141 is a deficient number, since it is larger than the sum of its proper divisors (33908050059).

77774721141 is a wasteful number, since it uses less digits than its factorization.

77774721141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111596.

The product of its digits is 537824, while the sum is 48.

The spelling of 77774721141 in words is "seventy-seven billion, seven hundred seventy-four million, seven hundred twenty-one thousand, one hundred forty-one".