1641989624 has 16 divisors (see below), whose sum is σ = 3358615320. Its totient is φ = 746358880.

The previous prime is 1641989621. The next prime is 1641989627. The reversal of 1641989624 is 4269891461.

It is an interprime number because it is at equal distance from previous prime (1641989621) and next prime (1641989627).

It is a super-2 number, since 2×1641989624² = 5392259850647322752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641989621) 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, 9329399 + ... + 9329574.

Almost surely, 2^1641989624 is an apocalyptic number.

It is an amenable number.

1641989624 is an abundant number, since it is smaller than the sum of its proper divisors (1716625696).

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

1641989624 is a wasteful number, since it uses less digits than its factorization.

1641989624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18658990 (or 18658986 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The square root of 1641989624 is about 40521.4711480223. The cubic root of 1641989624 is about 1179.7504078059.

The spelling of 1641989624 in words is "one billion, six hundred forty-one million, nine hundred eighty-nine thousand, six hundred twenty-four".