78242084648 has 64 divisors (see below), whose sum is σ = 184962597120. Its totient is φ = 30197952000.

The previous prime is 78242084633. The next prime is 78242084681. The reversal of 78242084648 is 84648024287.

It is a super-2 number, since 2×78242084648² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78242084648.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280828 + ... + 1340523.

It is an arithmetic number, because the mean of its divisors is an integer number (2890040580).

Almost surely, 2^78242084648 is an apocalyptic number.

It is an amenable number.

78242084648 is an abundant number, since it is smaller than the sum of its proper divisors (106720512472).

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

78242084648 is a wasteful number, since it uses less digits than its factorization.

78242084648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621418 (or 2621414 counting only the distinct ones).

The product of its (nonzero) digits is 5505024, while the sum is 53.

The spelling of 78242084648 in words is "seventy-eight billion, two hundred forty-two million, eighty-four thousand, six hundred forty-eight".