1612613161 has 4 divisors (see below), whose sum is σ = 1630732500. Its totient is φ = 1594493824.

The previous prime is 1612613159. The next prime is 1612613173. The reversal of 1612613161 is 1613162161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1613162161 = 13 ⋅124089397.

It can be written as a sum of positive squares in 2 ways, for example, as 133749225 + 1478863936 = 11565^2 + 38456^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612613161 - 2¹ = 1612613159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1612613461) 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, 9059536 + ... + 9059713.

It is an arithmetic number, because the mean of its divisors is an integer number (407683125).

Almost surely, 2^1612613161 is an apocalyptic number.

It is an amenable number.

1612613161 is a deficient number, since it is larger than the sum of its proper divisors (18119339).

1612613161 is an equidigital number, since it uses as much as digits as its factorization.

1612613161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18119338.

The product of its digits is 1296, while the sum is 28.

The square root of 1612613161 is about 40157.3550050299. The cubic root of 1612613161 is about 1172.6724798431.

The spelling of 1612613161 in words is "one billion, six hundred twelve million, six hundred thirteen thousand, one hundred sixty-one".