1641697008 has 160 divisors (see below), whose sum is σ = 5030154240. Its totient is φ = 451491840.

The previous prime is 1641696943. The next prime is 1641697019. The reversal of 1641697008 is 8007961461.

1641697008 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 2884948 + ... + 2885516.

It is an arithmetic number, because the mean of its divisors is an integer number (31438464).

Almost surely, 2^1641697008 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 1641697008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2515077120).

1641697008 is an abundant number, since it is smaller than the sum of its proper divisors (3388457232).

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

1641697008 is a wasteful number, since it uses less digits than its factorization.

1641697008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1641697008 is about 40517.8603581186. The cubic root of 1641697008 is about 1179.6803232473.

The spelling of 1641697008 in words is "one billion, six hundred forty-one million, six hundred ninety-seven thousand, eight".