78148471450779 has 12 divisors (see below), whose sum is σ = 112881271167496. Its totient is φ = 52098913703232.

The previous prime is 78148471450729. The next prime is 78148471450811. The reversal of 78148471450779 is 97705417484187.

78148471450779 is a `hidden beast` number, since 7 + 8 + 1 + 4 + 8 + 47 + 1 + 4 + 507 + 79 = 666.

It is not a de Polignac number, because 78148471450779 - 2³³ = 78139881516187 is a prime.

It is a super-2 number, since 2×78148471450779² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78148471450729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2346579 + ... + 12720195.

Almost surely, 2^{78148471450779} is an apocalyptic number.

78148471450779 is a deficient number, since it is larger than the sum of its proper divisors (34732799716717).

78148471450779 is a wasteful number, since it uses less digits than its factorization.

78148471450779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210666 (or 11210663 counting only the distinct ones).

The product of its (nonzero) digits is 442552320, while the sum is 72.

The spelling of 78148471450779 in words is "seventy-eight trillion, one hundred forty-eight billion, four hundred seventy-one million, four hundred fifty thousand, seven hundred seventy-nine".