78148403250 has 64 divisors (see below), whose sum is σ = 195267466368. Its totient is φ = 20817240000.

The previous prime is 78148403243. The next prime is 78148403257. The reversal of 78148403250 is 5230484187.

It is an interprime number because it is at equal distance from previous prime (78148403243) and next prime (78148403257).

It is a super-2 number, since 2×78148403250² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78148403257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 650385 + ... + 761115.

It is an arithmetic number, because the mean of its divisors is an integer number (3051054162).

Almost surely, 2^78148403250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78148403250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97633733184).

78148403250 is an abundant number, since it is smaller than the sum of its proper divisors (117119063118).

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

78148403250 is a wasteful number, since it uses less digits than its factorization.

78148403250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111692 (or 111682 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 78148403250 in words is "seventy-eight billion, one hundred forty-eight million, four hundred three thousand, two hundred fifty".