1561001016513 has 8 divisors (see below), whose sum is σ = 2091198834976. Its totient is φ = 1035735271200.

The previous prime is 1561001016493. The next prime is 1561001016517. The reversal of 1561001016513 is 3156101001651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1561001016513 - 2¹³ = 1561001008321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1561001016517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1233017548 + ... + 1233018813.

It is an arithmetic number, because the mean of its divisors is an integer number (261399854372).

Almost surely, 2^{1561001016513} is an apocalyptic number.

It is an amenable number.

1561001016513 is a deficient number, since it is larger than the sum of its proper divisors (530197818463).

1561001016513 is a wasteful number, since it uses less digits than its factorization.

1561001016513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466036575.

The product of its (nonzero) digits is 2700, while the sum is 30.

The spelling of 1561001016513 in words is "one trillion, five hundred sixty-one billion, one million, sixteen thousand, five hundred thirteen".