77780341412 has 6 divisors (see below), whose sum is σ = 136115597478. Its totient is φ = 38890170704.

The previous prime is 77780341411. The next prime is 77780341421. The reversal of 77780341412 is 21414308777.

It can be written as a sum of positive squares in only one way, i.e., 69372184996 + 8408156416 = 263386^2 + 91696^2 .

It is not an unprimeable number, because it can be changed into a prime (77780341411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9722542673 + ... + 9722542680.

It is an arithmetic number, because the mean of its divisors is an integer number (22685932913).

Almost surely, 2^77780341412 is an apocalyptic number.

It is an amenable number.

77780341412 is a deficient number, since it is larger than the sum of its proper divisors (58335256066).

77780341412 is a wasteful number, since it uses less digits than its factorization.

77780341412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19445085357 (or 19445085355 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 77780341412 in words is "seventy-seven billion, seven hundred eighty million, three hundred forty-one thousand, four hundred twelve".