1015520161566 has 32 divisors (see below), whose sum is σ = 2064286905120. Its totient is φ = 333004238336.

The previous prime is 1015520161529. The next prime is 1015520161567. The reversal of 1015520161566 is 6651610255101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1015520161567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4721511 + ... + 4931906.

It is an arithmetic number, because the mean of its divisors is an integer number (64508965785).

Almost surely, 2^{1015520161566} is an apocalyptic number.

1015520161566 is an abundant number, since it is smaller than the sum of its proper divisors (1048766743554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1015520161566 is a wasteful number, since it uses less digits than its factorization.

1015520161566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9653708.

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 1015520161566 in words is "one trillion, fifteen billion, five hundred twenty million, one hundred sixty-one thousand, five hundred sixty-six".