1611014381 has 4 divisors (see below), whose sum is σ = 1611184092. Its totient is φ = 1610844672.

The previous prime is 1611014359. The next prime is 1611014399. The reversal of 1611014381 is 1834101161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1834101161 = 157 ⋅11682173.

It can be written as a sum of positive squares in 2 ways, for example, as 247558756 + 1363455625 = 15734^2 + 36925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611014381 - 2²² = 1606820077 is a prime.

It is a super-2 number, since 2×1611014381² = 5190734671577626322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1611014381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611014081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69716 + ... + 89901.

It is an arithmetic number, because the mean of its divisors is an integer number (402796023).

Almost surely, 2^1611014381 is an apocalyptic number.

It is an amenable number.

1611014381 is a deficient number, since it is larger than the sum of its proper divisors (169711).

1611014381 is a wasteful number, since it uses less digits than its factorization.

1611014381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169710.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1611014381 is about 40137.4436281136. The cubic root of 1611014381 is about 1172.2848139763.

The spelling of 1611014381 in words is "one billion, six hundred eleven million, fourteen thousand, three hundred eighty-one".