1641394524 has 192 divisors, whose sum is σ = 4922975232. Its totient is φ = 416782080.

The previous prime is 1641394511. The next prime is 1641394529. The reversal of 1641394524 is 4254931461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641394529) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5925474 + ... + 5925750.

It is an arithmetic number, because the mean of its divisors is an integer number (25640496).

Almost surely, 2^1641394524 is an apocalyptic number.

1641394524 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 1641394524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2461487616).

1641394524 is an abundant number, since it is smaller than the sum of its proper divisors (3281580708).

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

1641394524 is a wasteful number, since it uses less digits than its factorization.

1641394524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 353 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 1641394524 is about 40514.1274619114. The cubic root of 1641394524 is about 1179.6078664462.

The spelling of 1641394524 in words is "one billion, six hundred forty-one million, three hundred ninety-four thousand, five hundred twenty-four".