1671049656 has 128 divisors (see below), whose sum is σ = 4767206400. Its totient is φ = 542108160.

The previous prime is 1671049631. The next prime is 1671049661. The reversal of 1671049656 is 6569401761.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2446291 + ... + 2446973.

It is an arithmetic number, because the mean of its divisors is an integer number (37243800).

Almost surely, 2^1671049656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1671049656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2383603200).

1671049656 is an abundant number, since it is smaller than the sum of its proper divisors (3096156744).

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

1671049656 is a wasteful number, since it uses less digits than its factorization.

1671049656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1671049656 is about 40878.4742376718. The cubic root of 1671049656 is about 1186.6695134525.

It can be divided in two parts, 16710 and 49656, that added together give a palindrome (66366).

The spelling of 1671049656 in words is "one billion, six hundred seventy-one million, forty-nine thousand, six hundred fifty-six".