78621527504 has 40 divisors (see below), whose sum is σ = 164065749120. Its totient is φ = 36282676608.

The previous prime is 78621527497. The next prime is 78621527507. The reversal of 78621527504 is 40572512687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78621527507) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2471669 + ... + 2503275.

It is an arithmetic number, because the mean of its divisors is an integer number (4101643728).

Almost surely, 2^78621527504 is an apocalyptic number.

It is an amenable number.

78621527504 is an abundant number, since it is smaller than the sum of its proper divisors (85444221616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78621527504 is a wasteful number, since it uses less digits than its factorization.

78621527504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43587 (or 43581 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 78621527504 in words is "seventy-eight billion, six hundred twenty-one million, five hundred twenty-seven thousand, five hundred four".