1611606151 has 4 divisors (see below), whose sum is σ = 1655163112. Its totient is φ = 1568049192.

The previous prime is 1611606149. The next prime is 1611606179. The reversal of 1611606151 is 1516061161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1516061161 = 2917 ⋅519733.

It is a cyclic number.

It is not a de Polignac number, because 1611606151 - 2¹ = 1611606149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611606751) 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, 21778425 + ... + 21778498.

It is an arithmetic number, because the mean of its divisors is an integer number (413790778).

Almost surely, 2^1611606151 is an apocalyptic number.

1611606151 is a deficient number, since it is larger than the sum of its proper divisors (43556961).

1611606151 is an equidigital number, since it uses as much as digits as its factorization.

1611606151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43556960.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 1611606151 is about 40144.8147461163. The cubic root of 1611606151 is about 1172.4283339160.

The spelling of 1611606151 in words is "one billion, six hundred eleven million, six hundred six thousand, one hundred fifty-one".