4278520323442 has 16 divisors (see below), whose sum is σ = 6421417149600. Its totient is φ = 2138048142048.

The previous prime is 4278520323433. The next prime is 4278520323449. The reversal of 4278520323442 is 2443230258724.

It is a junction number, because it is equal to n+sod(n) for n = 4278520323392 and 4278520323401.

It is not an unprimeable number, because it can be changed into a prime (4278520323449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48966309 + ... + 49053607.

It is an arithmetic number, because the mean of its divisors is an integer number (401338571850).

Almost surely, 2^{4278520323442} is an apocalyptic number.

4278520323442 is a deficient number, since it is larger than the sum of its proper divisors (2142896826158).

4278520323442 is a wasteful number, since it uses less digits than its factorization.

4278520323442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100905.

The product of its (nonzero) digits is 2580480, while the sum is 46.

The spelling of 4278520323442 in words is "four trillion, two hundred seventy-eight billion, five hundred twenty million, three hundred twenty-three thousand, four hundred forty-two".