40135533520 has 80 divisors (see below), whose sum is σ = 95837437440. Its totient is φ = 15625664000.

The previous prime is 40135533469. The next prime is 40135533523. The reversal of 40135533520 is 2533553104.

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

It is a super-2 number, since 2×40135533520² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40135533523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434625 + ... + 518815.

It is an arithmetic number, because the mean of its divisors is an integer number (1197967968).

Almost surely, 2^40135533520 is an apocalyptic number.

40135533520 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 40135533520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47918718720).

40135533520 is an abundant number, since it is smaller than the sum of its proper divisors (55701903920).

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

40135533520 is a wasteful number, since it uses less digits than its factorization.

40135533520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84364 (or 84358 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 31.

The spelling of 40135533520 in words is "forty billion, one hundred thirty-five million, five hundred thirty-three thousand, five hundred twenty".