3520071861242 has 4 divisors (see below), whose sum is σ = 5280107791866. Its totient is φ = 1760035930620.

The previous prime is 3520071861239. The next prime is 3520071861281. The reversal of 3520071861242 is 2421681700253.

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., 1829502413281 + 1690569447961 = 1352591^2 + 1300219^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3520071861242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 880017965309 + ... + 880017965312.

Almost surely, 2^{3520071861242} is an apocalyptic number.

3520071861242 is a deficient number, since it is larger than the sum of its proper divisors (1760035930624).

3520071861242 is a wasteful number, since it uses less digits than its factorization.

3520071861242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760035930623.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 3520071861242 in words is "three trillion, five hundred twenty billion, seventy-one million, eight hundred sixty-one thousand, two hundred forty-two".