4315121556442 has 4 divisors (see below), whose sum is σ = 6472682334666. Its totient is φ = 2157560778220.

The previous prime is 4315121556419. The next prime is 4315121556457. The reversal of 4315121556442 is 2446551215134.

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., 4305247358281 + 9874198161 = 2074909^2 + 99369^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078780389109 + ... + 1078780389112.

Almost surely, 2^{4315121556442} is an apocalyptic number.

4315121556442 is a deficient number, since it is larger than the sum of its proper divisors (2157560778224).

4315121556442 is a wasteful number, since it uses less digits than its factorization.

4315121556442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157560778223.

The product of its digits is 576000, while the sum is 43.

The spelling of 4315121556442 in words is "four trillion, three hundred fifteen billion, one hundred twenty-one million, five hundred fifty-six thousand, four hundred forty-two".