6556015521602 has 4 divisors (see below), whose sum is σ = 9834023282406. Its totient is φ = 3278007760800.

The previous prime is 6556015521577. The next prime is 6556015521607. The reversal of 6556015521602 is 2061255106556.

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., 4941644526361 + 1614370995241 = 2222981^2 + 1270579^2 .

It is not an unprimeable number, because it can be changed into a prime (6556015521607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1639003880399 + ... + 1639003880402.

Almost surely, 2^{6556015521602} is an apocalyptic number.

6556015521602 is a deficient number, since it is larger than the sum of its proper divisors (3278007760804).

6556015521602 is a wasteful number, since it uses less digits than its factorization.

6556015521602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3278007760803.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 6556015521602 in words is "six trillion, five hundred fifty-six billion, fifteen million, five hundred twenty-one thousand, six hundred two".