78760331505 has 64 divisors (see below), whose sum is σ = 146159769600. Its totient is φ = 40193556480.

The previous prime is 78760331473. The next prime is 78760331527. The reversal of 78760331505 is 50513306787.

78760331505 is a `hidden beast` number, since 7 + 8 + 7 + 603 + 31 + 5 + 0 + 5 = 666.

It is not a de Polignac number, because 78760331505 - 2⁵ = 78760331473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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, 266737 + ... + 478193.

It is an arithmetic number, because the mean of its divisors is an integer number (2283746400).

Almost surely, 2^78760331505 is an apocalyptic number.

It is an amenable number.

78760331505 is a deficient number, since it is larger than the sum of its proper divisors (67399438095).

78760331505 is a wasteful number, since it uses less digits than its factorization.

78760331505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211591 (or 211585 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 78760331505 in words is "seventy-eight billion, seven hundred sixty million, three hundred thirty-one thousand, five hundred five".