64780051892 has 12 divisors (see below), whose sum is σ = 113722711620. Its totient is φ = 32287848576.

The previous prime is 64780051877. The next prime is 64780051937. The reversal of 64780051892 is 29815008746.

It can be written as a sum of positive squares in 2 ways, for example, as 6189912976 + 58590138916 = 78676^2 + 242054^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64780051892.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25542917 + ... + 25545452.

It is an arithmetic number, because the mean of its divisors is an integer number (9476892635).

Almost surely, 2^64780051892 is an apocalyptic number.

It is an amenable number.

64780051892 is a deficient number, since it is larger than the sum of its proper divisors (48942659728).

64780051892 is a wasteful number, since it uses less digits than its factorization.

64780051892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51088690 (or 51088688 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 64780051892 in words is "sixty-four billion, seven hundred eighty million, fifty-one thousand, eight hundred ninety-two".