42404045636506 has 4 divisors (see below), whose sum is σ = 63606068454762. Its totient is φ = 21202022818252.

The previous prime is 42404045636423. The next prime is 42404045636539. The reversal of 42404045636506 is 60563654040424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41972581890625 + 431463745881 = 6478625^2 + 656859^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42404045636506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601011409125 + ... + 10601011409128.

Almost surely, 2^{42404045636506} is an apocalyptic number.

42404045636506 is a deficient number, since it is larger than the sum of its proper divisors (21202022818256).

42404045636506 is a wasteful number, since it uses less digits than its factorization.

42404045636506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21202022818255.

The product of its (nonzero) digits is 8294400, while the sum is 49.

The spelling of 42404045636506 in words is "forty-two trillion, four hundred four billion, forty-five million, six hundred thirty-six thousand, five hundred six".