77520201412 has 6 divisors (see below), whose sum is σ = 135660352478. Its totient is φ = 38760100704.

The previous prime is 77520201401. The next prime is 77520201413. The reversal of 77520201412 is 21410202577.

It can be written as a sum of positive squares in only one way, i.e., 43107725376 + 34412476036 = 207624^2 + 185506^2 .

It is not an unprimeable number, because it can be changed into a prime (77520201413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9690025173 + ... + 9690025180.

Almost surely, 2^77520201412 is an apocalyptic number.

It is an amenable number.

77520201412 is a deficient number, since it is larger than the sum of its proper divisors (58140151066).

77520201412 is a wasteful number, since it uses less digits than its factorization.

77520201412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19380050357 (or 19380050355 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

Adding to 77520201412 its reverse (21410202577), we get a palindrome (98930403989).

The spelling of 77520201412 in words is "seventy-seven billion, five hundred twenty million, two hundred one thousand, four hundred twelve".