1671611004 has 72 divisors (see below), whose sum is σ = 4876985568. Its totient is φ = 472867200.

The previous prime is 1671610981. The next prime is 1671611027. The reversal of 1671611004 is 4001161761.

It is an interprime number because it is at equal distance from previous prime (1671610981) and next prime (1671611027).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7387 + ... + 58290.

Almost surely, 2^1671611004 is an apocalyptic number.

1671611004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1671611004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2438492784).

1671611004 is an abundant number, since it is smaller than the sum of its proper divisors (3205374564).

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

1671611004 is a wasteful number, since it uses less digits than its factorization.

1671611004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65795 (or 65790 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1671611004 is about 40885.3397197577. The cubic root of 1671611004 is about 1186.8023760476.

Adding to 1671611004 its reverse (4001161761), we get a palindrome (5672772765).

The spelling of 1671611004 in words is "one billion, six hundred seventy-one million, six hundred eleven thousand, four".