40391872500 has 480 divisors, whose sum is σ = 143896338432. Its totient is φ = 8605440000.

The previous prime is 40391872459. The next prime is 40391872603. The reversal of 40391872500 is 527819304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 149047365 + ... + 149047635.

Almost surely, 2^40391872500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40391872500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71948169216).

40391872500 is an abundant number, since it is smaller than the sum of its proper divisors (103504465932).

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

40391872500 is a wasteful number, since it uses less digits than its factorization.

40391872500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 40391872500 in words is "forty billion, three hundred ninety-one million, eight hundred seventy-two thousand, five hundred".