77321551064 has 16 divisors (see below), whose sum is σ = 151281295920. Its totient is φ = 36979872160.

The previous prime is 77321551063. The next prime is 77321551079. The reversal of 77321551064 is 46015512377.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77321551063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210112727 + ... + 210113094.

It is an arithmetic number, because the mean of its divisors is an integer number (9455080995).

Almost surely, 2^77321551064 is an apocalyptic number.

It is an amenable number.

77321551064 is a deficient number, since it is larger than the sum of its proper divisors (73959744856).

77321551064 is a wasteful number, since it uses less digits than its factorization.

77321551064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420225850 (or 420225846 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 77321551064 in words is "seventy-seven billion, three hundred twenty-one million, five hundred fifty-one thousand, sixty-four".