1618105061 has 4 divisors (see below), whose sum is σ = 1623863724. Its totient is φ = 1612346400.

The previous prime is 1618105009. The next prime is 1618105103. The reversal of 1618105061 is 1605018161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1605018161 = 17 ⋅94412833.

It can be written as a sum of positive squares in 2 ways, for example, as 631768225 + 986336836 = 25135^2 + 31406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1618105061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618105561) 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, 2878910 + ... + 2879471.

It is an arithmetic number, because the mean of its divisors is an integer number (405965931).

Almost surely, 2^1618105061 is an apocalyptic number.

It is an amenable number.

1618105061 is a deficient number, since it is larger than the sum of its proper divisors (5758663).

1618105061 is an equidigital number, since it uses as much as digits as its factorization.

1618105061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5758662.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 1618105061 is about 40225.6766381872. The cubic root of 1618105061 is about 1174.0021855766.

The spelling of 1618105061 in words is "one billion, six hundred eighteen million, one hundred five thousand, sixty-one".