78750457506 has 144 divisors (see below), whose sum is σ = 204800188320. Its totient is φ = 21792032640.

The previous prime is 78750457481. The next prime is 78750457523. The reversal of 78750457506 is 60575405787.

It is a happy number.

78750457506 is a `hidden beast` number, since 7 + 87 + 5 + 0 + 4 + 57 + 506 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5018685 + ... + 5034351.

It is an arithmetic number, because the mean of its divisors is an integer number (1422223530).

Almost surely, 2^78750457506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78750457506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102400094160).

78750457506 is an abundant number, since it is smaller than the sum of its proper divisors (126049730814).

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

78750457506 is a wasteful number, since it uses less digits than its factorization.

78750457506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15869 (or 15859 counting only the distinct ones).

The product of its (nonzero) digits is 8232000, while the sum is 54.

The spelling of 78750457506 in words is "seventy-eight billion, seven hundred fifty million, four hundred fifty-seven thousand, five hundred six".