16006151561 has 4 divisors (see below), whose sum is σ = 16008349392. Its totient is φ = 16003953732.

The previous prime is 16006151549. The next prime is 16006151597. The reversal of 16006151561 is 16515160061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16515160061 = 79 ⋅209052659.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16006151561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16006153561) 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, 1087955 + ... + 1102568.

It is an arithmetic number, because the mean of its divisors is an integer number (4002087348).

Almost surely, 2^16006151561 is an apocalyptic number.

It is an amenable number.

16006151561 is a deficient number, since it is larger than the sum of its proper divisors (2197831).

16006151561 is an equidigital number, since it uses as much as digits as its factorization.

16006151561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197830.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 16006151561 in words is "sixteen billion, six million, one hundred fifty-one thousand, five hundred sixty-one".