40451221344 has 48 divisors (see below), whose sum is σ = 106225448112. Its totient is φ = 13478535168.

The previous prime is 40451221313. The next prime is 40451221373. The reversal of 40451221344 is 44312215404.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172752 + ... + 332784.

It is an arithmetic number, because the mean of its divisors is an integer number (2213030169).

Almost surely, 2^40451221344 is an apocalyptic number.

It is an amenable number.

40451221344 is an abundant number, since it is smaller than the sum of its proper divisors (65774226768).

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

40451221344 is a wasteful number, since it uses less digits than its factorization.

40451221344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162679 (or 162671 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 40451221344 its reverse (44312215404), we get a palindrome (84763436748).

The spelling of 40451221344 in words is "forty billion, four hundred fifty-one million, two hundred twenty-one thousand, three hundred forty-four".