78339694650 has 48 divisors (see below), whose sum is σ = 222037080384. Its totient is φ = 17906215680.

The previous prime is 78339694633. The next prime is 78339694681. The reversal of 78339694650 is 5649693387.

It is a super-2 number, since 2×78339694650² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 37303567 + ... + 37305666.

It is an arithmetic number, because the mean of its divisors is an integer number (4625772508).

Almost surely, 2^78339694650 is an apocalyptic number.

78339694650 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78339694650 is an abundant number, since it is smaller than the sum of its proper divisors (143697385734).

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

78339694650 is a wasteful number, since it uses less digits than its factorization.

78339694650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74609255 (or 74609250 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 60.

The spelling of 78339694650 in words is "seventy-eight billion, three hundred thirty-nine million, six hundred ninety-four thousand, six hundred fifty".