78799228469640 has 128 divisors (see below), whose sum is σ = 300187537056000. Its totient is φ = 18011252219904.

The previous prime is 78799228469623. The next prime is 78799228469677. The reversal of 78799228469640 is 4696482299787.

78799228469640 is a `hidden beast` number, since 7 + 8 + 7 + 9 + 92 + 2 + 8 + 469 + 64 + 0 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 78799228469640.

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 31 ways as a sum of consecutive naturals, for example, 5211581625 + ... + 5211596744.

It is an arithmetic number, because the mean of its divisors is an integer number (2345215133250).

Almost surely, 2^{78799228469640} is an apocalyptic number.

78799228469640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78799228469640 is an abundant number, since it is smaller than the sum of its proper divisors (221388308586360).

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

78799228469640 is a wasteful number, since it uses less digits than its factorization.

78799228469640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10423178396 (or 10423178386 counting only the distinct ones).

The product of its (nonzero) digits is 5267275776, while the sum is 81.

The spelling of 78799228469640 in words is "seventy-eight trillion, seven hundred ninety-nine billion, two hundred twenty-eight million, four hundred sixty-nine thousand, six hundred forty".