1611761642 has 8 divisors (see below), whose sum is σ = 2457276132. Its totient is φ = 792669600.

The previous prime is 1611761633. The next prime is 1611761663. The reversal of 1611761642 is 2461671161.

It can be written as a sum of positive squares in 2 ways, for example, as 1199306161 + 412455481 = 34631^2 + 20309^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6605459 + ... + 6605702.

Almost surely, 2^1611761642 is an apocalyptic number.

1611761642 is a deficient number, since it is larger than the sum of its proper divisors (845514490).

1611761642 is a wasteful number, since it uses less digits than its factorization.

1611761642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13211224.

The product of its digits is 12096, while the sum is 35.

The square root of 1611761642 is about 40146.7513256054. The cubic root of 1611761642 is about 1172.4660387840.

The spelling of 1611761642 in words is "one billion, six hundred eleven million, seven hundred sixty-one thousand, six hundred forty-two".