78742547250 has 128 divisors (see below), whose sum is σ = 205298496000. Its totient is φ = 20076537600.

The previous prime is 78742547249. The next prime is 78742547251. The reversal of 78742547250 is 5274524787.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78742547249) and next prime (78742547251).

It is a junction number, because it is equal to n+sod(n) for n = 78742547193 and 78742547202.

It is not an unprimeable number, because it can be changed into a prime (78742547251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2222676 + ... + 2257824.

It is an arithmetic number, because the mean of its divisors is an integer number (1603894500).

Almost surely, 2^78742547250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78742547250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102649248000).

78742547250 is an abundant number, since it is smaller than the sum of its proper divisors (126555948750).

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

78742547250 is a wasteful number, since it uses less digits than its factorization.

78742547250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35301 (or 35291 counting only the distinct ones).

The product of its (nonzero) digits is 4390400, while the sum is 51.

The spelling of 78742547250 in words is "seventy-eight billion, seven hundred forty-two million, five hundred forty-seven thousand, two hundred fifty".