40991015520 has 480 divisors, whose sum is σ = 178053277248. Its totient is φ = 8648404992.

The previous prime is 40991015509. The next prime is 40991015551. The reversal of 40991015520 is 2551019904.

40991015520 is a `hidden beast` number, since 4 + 0 + 99 + 10 + 1 + 552 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1161982 + ... + 1196738.

Almost surely, 2^40991015520 is an apocalyptic number.

40991015520 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 40991015520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89026638624).

40991015520 is an abundant number, since it is smaller than the sum of its proper divisors (137062261728).

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

40991015520 is a wasteful number, since it uses less digits than its factorization.

40991015520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34804 (or 34787 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 40991015520 in words is "forty billion, nine hundred ninety-one million, fifteen thousand, five hundred twenty".