40989646680 has 256 divisors, whose sum is σ = 129173667840. Its totient is φ = 10395340800.

The previous prime is 40989646609. The next prime is 40989646729. The reversal of 40989646680 is 8664698904.

40989646680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 202459²-1.

It is a super-2 number, since 2×40989646680² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49804749 + ... + 49805571.

It is an arithmetic number, because the mean of its divisors is an integer number (504584640).

Almost surely, 2^40989646680 is an apocalyptic number.

40989646680 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 40989646680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64586833920).

40989646680 is an abundant number, since it is smaller than the sum of its proper divisors (88184021160).

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

40989646680 is a wasteful number, since it uses less digits than its factorization.

40989646680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 60.

The spelling of 40989646680 in words is "forty billion, nine hundred eighty-nine million, six hundred forty-six thousand, six hundred eighty".