78435858540 has 96 divisors (see below), whose sum is σ = 237229606656. Its totient is φ = 19248894720.

The previous prime is 78435858511. The next prime is 78435858569. The reversal of 78435858540 is 4585853487.

It is an interprime number because it is at equal distance from previous prime (78435858511) and next prime (78435858569).

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, 106279 + ... + 410081.

It is an arithmetic number, because the mean of its divisors is an integer number (2471141736).

Almost surely, 2^78435858540 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 78435858540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118614803328).

78435858540 is an abundant number, since it is smaller than the sum of its proper divisors (158793748116).

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

78435858540 is a wasteful number, since it uses less digits than its factorization.

78435858540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304159 (or 304157 counting only the distinct ones).

The product of its (nonzero) digits is 21504000, while the sum is 57.

The spelling of 78435858540 in words is "seventy-eight billion, four hundred thirty-five million, eight hundred fifty-eight thousand, five hundred forty".