1611512004 has 12 divisors (see below), whose sum is σ = 3760194704. Its totient is φ = 537170664.

The previous prime is 1611511931. The next prime is 1611512009. The reversal of 1611512004 is 4002151161.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1611512009) 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, 67146322 + ... + 67146345.

Almost surely, 2^1611512004 is an apocalyptic number.

It is an amenable number.

1611512004 is an abundant number, since it is smaller than the sum of its proper divisors (2148682700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1611512004 is a wasteful number, since it uses less digits than its factorization.

1611512004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134292674 (or 134292672 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1611512004 is about 40143.6421367070. The cubic root of 1611512004 is about 1172.4055031188.

Adding to 1611512004 its reverse (4002151161), we get a palindrome (5613663165).

The spelling of 1611512004 in words is "one billion, six hundred eleven million, five hundred twelve thousand, four".