40405221724 has 96 divisors (see below), whose sum is σ = 83581761536. Its totient is φ = 16734574080.

The previous prime is 40405221709. The next prime is 40405221739. The reversal of 40405221724 is 42712250404.

It is an interprime number because it is at equal distance from previous prime (40405221709) and next prime (40405221739).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45758587 + ... + 45759469.

Almost surely, 2^40405221724 is an apocalyptic number.

It is an amenable number.

40405221724 is an abundant number, since it is smaller than the sum of its proper divisors (43176539812).

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

40405221724 is a wasteful number, since it uses less digits than its factorization.

40405221724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1393 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 31.

The spelling of 40405221724 in words is "forty billion, four hundred five million, two hundred twenty-one thousand, seven hundred twenty-four".