78471520307446 has 16 divisors (see below), whose sum is σ = 137060768624544. Its totient is φ = 32996110964544.

The previous prime is 78471520307429. The next prime is 78471520307507. The reversal of 78471520307446 is 64470302517487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52878382215 + ... + 52878383698.

It is an arithmetic number, because the mean of its divisors is an integer number (8566298039034).

Almost surely, 2^{78471520307446} is an apocalyptic number.

78471520307446 is a deficient number, since it is larger than the sum of its proper divisors (58589248317098).

78471520307446 is a wasteful number, since it uses less digits than its factorization.

78471520307446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105756765975.

The product of its (nonzero) digits is 31610880, while the sum is 58.

The spelling of 78471520307446 in words is "seventy-eight trillion, four hundred seventy-one billion, five hundred twenty million, three hundred seven thousand, four hundred forty-six".