78349961448 has 128 divisors (see below), whose sum is σ = 237866889600. Its totient is φ = 23698137600.

The previous prime is 78349961381. The next prime is 78349961453. The reversal of 78349961448 is 84416994387.

78349961448 is a `hidden beast` number, since 7 + 8 + 3 + 4 + 9 + 9 + 614 + 4 + 8 = 666.

It is a super-2 number, since 2×78349961448² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1254940 + ... + 1315892.

It is an arithmetic number, because the mean of its divisors is an integer number (1858335075).

Almost surely, 2^78349961448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78349961448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118933444800).

78349961448 is an abundant number, since it is smaller than the sum of its proper divisors (159516928152).

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

78349961448 is a wasteful number, since it uses less digits than its factorization.

78349961448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61520 (or 61510 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 78349961448 in words is "seventy-eight billion, three hundred forty-nine million, nine hundred sixty-one thousand, four hundred forty-eight".