40421361520 has 80 divisors (see below), whose sum is σ = 99037946880. Its totient is φ = 15300230400.

The previous prime is 40421361503. The next prime is 40421361571. The reversal of 40421361520 is 2516312404.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1370125 + ... + 1399315.

It is an arithmetic number, because the mean of its divisors is an integer number (1237974336).

Almost surely, 2^40421361520 is an apocalyptic number.

40421361520 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 40421361520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49518973440).

40421361520 is an abundant number, since it is smaller than the sum of its proper divisors (58616585360).

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

40421361520 is a wasteful number, since it uses less digits than its factorization.

40421361520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30134 (or 30128 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 40421361520 its reverse (2516312404), we get a palindrome (42937673924).

The spelling of 40421361520 in words is "forty billion, four hundred twenty-one million, three hundred sixty-one thousand, five hundred twenty".