1611604534 has 4 divisors (see below), whose sum is σ = 2417406804. Its totient is φ = 805802266.

The previous prime is 1611604499. The next prime is 1611604537. The reversal of 1611604534 is 4354061161.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1611604496 and 1611604505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611604537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402901132 + ... + 402901135.

It is an arithmetic number, because the mean of its divisors is an integer number (604351701).

Almost surely, 2^1611604534 is an apocalyptic number.

1611604534 is a deficient number, since it is larger than the sum of its proper divisors (805802270).

1611604534 is an equidigital number, since it uses as much as digits as its factorization.

1611604534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805802269.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1611604534 is about 40144.7946065240. The cubic root of 1611604534 is about 1172.4279417984.

Adding to 1611604534 its reverse (4354061161), we get a palindrome (5965665695).

The spelling of 1611604534 in words is "one billion, six hundred eleven million, six hundred four thousand, five hundred thirty-four".