77928413563 has 64 divisors (see below), whose sum is σ = 107493120000. Its totient is φ = 55670993280.

The previous prime is 77928413561. The next prime is 77928413587. The reversal of 77928413563 is 36531482977.

It is not a de Polignac number, because 77928413563 - 2¹ = 77928413561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77928413561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7302970 + ... + 7313632.

It is an arithmetic number, because the mean of its divisors is an integer number (1679580000).

Almost surely, 2^77928413563 is an apocalyptic number.

77928413563 is a deficient number, since it is larger than the sum of its proper divisors (29564706437).

77928413563 is a wasteful number, since it uses less digits than its factorization.

77928413563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10857 (or 10843 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 55.

The spelling of 77928413563 in words is "seventy-seven billion, nine hundred twenty-eight million, four hundred thirteen thousand, five hundred sixty-three".