41561667920 has 90 divisors (see below), whose sum is σ = 101116922634. Its totient is φ = 15885809280.

The previous prime is 41561667919. The next prime is 41561667967. The reversal of 41561667920 is 2976616514.

It can be written as a sum of positive squares in only one way, i.e., 33249334336 + 8312333584 = 182344^2 + 91172^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 41938625 + ... + 41939615.

Almost surely, 2^41561667920 is an apocalyptic number.

41561667920 is a gapful number since it is divisible by the number (40) 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 41561667920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50558461317).

41561667920 is an abundant number, since it is smaller than the sum of its proper divisors (59555254714).

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

41561667920 is an frugal number, since it uses more digits than its factorization.

41561667920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 41561667920 in words is "forty-one billion, five hundred sixty-one million, six hundred sixty-seven thousand, nine hundred twenty".