128255040726442 has 32 divisors (see below), whose sum is σ = 226376889107328. Its totient is φ = 53346153807936.

The previous prime is 128255040726413. The next prime is 128255040726487. The reversal of 128255040726442 is 244627040552821.

It is a self number, because there is not a number n which added to its sum of digits gives 128255040726442.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311628868 + ... + 312040159.

It is an arithmetic number, because the mean of its divisors is an integer number (7074277784604).

Almost surely, 2^{128255040726442} is an apocalyptic number.

128255040726442 is a deficient number, since it is larger than the sum of its proper divisors (98121848380886).

128255040726442 is a wasteful number, since it uses less digits than its factorization.

128255040726442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623669470.

The product of its (nonzero) digits is 8601600, while the sum is 52.

The spelling of 128255040726442 in words is "one hundred twenty-eight trillion, two hundred fifty-five billion, forty million, seven hundred twenty-six thousand, four hundred forty-two".