78220458118650 has 48 divisors (see below), whose sum is σ = 195986599429824. Its totient is φ = 20643749767680.

The previous prime is 78220458118639. The next prime is 78220458118661. The reversal of 78220458118650 is 5681185402287.

78220458118650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (78220458118639) and next prime (78220458118661).

It is a super-2 number, since 2×78220458118650² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2687973702 + ... + 2688002801.

It is an arithmetic number, because the mean of its divisors is an integer number (4083054154788).

Almost surely, 2^{78220458118650} is an apocalyptic number.

78220458118650 is an abundant number, since it is smaller than the sum of its proper divisors (117766141311174).

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

78220458118650 is a wasteful number, since it uses less digits than its factorization.

78220458118650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5375976615 (or 5375976610 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 57.

The spelling of 78220458118650 in words is "seventy-eight trillion, two hundred twenty billion, four hundred fifty-eight million, one hundred eighteen thousand, six hundred fifty".