1001566161501 has 8 divisors (see below), whose sum is σ = 1335456425760. Its totient is φ = 667693335792.

The previous prime is 1001566161499. The next prime is 1001566161509. The reversal of 1001566161501 is 1051616651001.

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

It is not a de Polignac number, because 1001566161501 - 2¹ = 1001566161499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001566161509) 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, 4225030 + ... + 4455783.

It is an arithmetic number, because the mean of its divisors is an integer number (166932053220).

Almost surely, 2^{1001566161501} is an apocalyptic number.

It is an amenable number.

1001566161501 is a deficient number, since it is larger than the sum of its proper divisors (333890264259).

1001566161501 is an equidigital number, since it uses as much as digits as its factorization.

1001566161501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8719275.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 1001566161501 in words is "one trillion, one billion, five hundred sixty-six million, one hundred sixty-one thousand, five hundred one".