1561006162067 has 4 divisors (see below), whose sum is σ = 1702915813176. Its totient is φ = 1419096510960.

The previous prime is 1561006162049. The next prime is 1561006162073. The reversal of 1561006162067 is 7602616001651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1561006162067 is a prime.

It is a super-3 number, since 3×1561006162067³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561006162267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70954825538 + ... + 70954825559.

It is an arithmetic number, because the mean of its divisors is an integer number (425728953294).

Almost surely, 2^{1561006162067} is an apocalyptic number.

1561006162067 is a deficient number, since it is larger than the sum of its proper divisors (141909651109).

1561006162067 is a wasteful number, since it uses less digits than its factorization.

1561006162067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141909651108.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 1561006162067 in words is "one trillion, five hundred sixty-one billion, six million, one hundred sixty-two thousand, sixty-seven".