78349850555625 has 100 divisors (see below), whose sum is σ = 159550476066960. Its totient is φ = 37987806060000.

The previous prime is 78349850555623. The next prime is 78349850555629. The reversal of 78349850555625 is 52655505894387.

78349850555625 is a `hidden beast` number, since 7 + 8 + 3 + 4 + 9 + 8 + 5 + 0 + 55 + 562 + 5 = 666.

It is not a de Polignac number, because 78349850555625 - 2¹ = 78349850555623 is a prime.

It is a super-2 number, since 2×78349850555625² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78349850555621) by changing a digit.

It is a polite number, since it can be written in 99 ways as a sum of consecutive naturals, for example, 69790915 + ... + 70904664.

Almost surely, 2^{78349850555625} is an apocalyptic number.

78349850555625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78349850555625 is an abundant number, since it is smaller than the sum of its proper divisors (81200625511335).

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

78349850555625 is a wasteful number, since it uses less digits than its factorization.

78349850555625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140695622 (or 140695598 counting only the distinct ones).

The product of its (nonzero) digits is 1814400000, while the sum is 72.

The spelling of 78349850555625 in words is "seventy-eight trillion, three hundred forty-nine billion, eight hundred fifty million, five hundred fifty-five thousand, six hundred twenty-five".