42781272247556 has 6 divisors (see below), whose sum is σ = 74867226433230. Its totient is φ = 21390636123776.

The previous prime is 42781272247487. The next prime is 42781272247561. The reversal of 42781272247556 is 65574227218724.

It can be written as a sum of positive squares in only one way, i.e., 34016119887556 + 8765152360000 = 5832334^2 + 2960600^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5347659030941 + ... + 5347659030948.

It is an arithmetic number, because the mean of its divisors is an integer number (12477871072205).

Almost surely, 2^{42781272247556} is an apocalyptic number.

It is an amenable number.

42781272247556 is a deficient number, since it is larger than the sum of its proper divisors (32085954185674).

42781272247556 is a wasteful number, since it uses less digits than its factorization.

42781272247556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10695318061893 (or 10695318061891 counting only the distinct ones).

The product of its digits is 105369600, while the sum is 62.

The spelling of 42781272247556 in words is "forty-two trillion, seven hundred eighty-one billion, two hundred seventy-two million, two hundred forty-seven thousand, five hundred fifty-six".