421766026442 has 16 divisors (see below), whose sum is σ = 666332964960. Its totient is φ = 199667925072.

The previous prime is 421766026433. The next prime is 421766026459. The reversal of 421766026442 is 244620667124.

It is a junction number, because it is equal to n+sod(n) for n = 421766026393 and 421766026402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3155393 + ... + 3286340.

It is an arithmetic number, because the mean of its divisors is an integer number (41645810310).

Almost surely, 2^421766026442 is an apocalyptic number.

421766026442 is a deficient number, since it is larger than the sum of its proper divisors (244566938518).

421766026442 is a wasteful number, since it uses less digits than its factorization.

421766026442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443477.

The product of its (nonzero) digits is 774144, while the sum is 44.

The spelling of 421766026442 in words is "four hundred twenty-one billion, seven hundred sixty-six million, twenty-six thousand, four hundred forty-two".