78285619500 has 192 divisors, whose sum is σ = 249269529600. Its totient is φ = 18934272000.

The previous prime is 78285619487. The next prime is 78285619507. The reversal of 78285619500 is 591658287.

It is a super-2 number, since 2×78285619500² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78285619507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7403217 + ... + 7413783.

It is an arithmetic number, because the mean of its divisors is an integer number (1298278800).

Almost surely, 2^78285619500 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 78285619500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124634764800).

78285619500 is an abundant number, since it is smaller than the sum of its proper divisors (170983910100).

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

78285619500 is a wasteful number, since it uses less digits than its factorization.

78285619500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11049 (or 11037 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 78285619500 in words is "seventy-eight billion, two hundred eighty-five million, six hundred nineteen thousand, five hundred".