40782745821 has 8 divisors (see below), whose sum is σ = 54378082080. Its totient is φ = 27187953392.

The previous prime is 40782745781. The next prime is 40782745873. The reversal of 40782745821 is 12854728704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40782745821 - 2⁷ = 40782745693 is a prime.

It is a super-3 number, since 3×40782745821³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40782745321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95146 + ... + 301028.

It is an arithmetic number, because the mean of its divisors is an integer number (6797260260).

Almost surely, 2^40782745821 is an apocalyptic number.

It is an amenable number.

40782745821 is a deficient number, since it is larger than the sum of its proper divisors (13595336259).

40782745821 is a wasteful number, since it uses less digits than its factorization.

40782745821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271915.

The product of its (nonzero) digits is 1003520, while the sum is 48.

The spelling of 40782745821 in words is "forty billion, seven hundred eighty-two million, seven hundred forty-five thousand, eight hundred twenty-one".