78019937424 has 400 divisors, whose sum is σ = 279265250880. Its totient is φ = 20674206720.

The previous prime is 78019937419. The next prime is 78019937431. The reversal of 78019937424 is 42473991087.

78019937424 is a `hidden beast` number, since 7 + 80 + 199 + 374 + 2 + 4 = 666.

It is a super-2 number, since 2×78019937424² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3510154 + ... + 3532310.

Almost surely, 2^78019937424 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 78019937424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139632625440).

78019937424 is an abundant number, since it is smaller than the sum of its proper divisors (201245313456).

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

78019937424 is a wasteful number, since it uses less digits than its factorization.

78019937424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22220 (or 22205 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 78019937424 in words is "seventy-eight billion, nineteen million, nine hundred thirty-seven thousand, four hundred twenty-four".