40972844781 has 48 divisors (see below), whose sum is σ = 65343283200. Its totient is φ = 24533292960.

The previous prime is 40972844767. The next prime is 40972844789. The reversal of 40972844781 is 18744827904.

40972844781 is a `hidden beast` number, since 4 + 0 + 97 + 2 + 84 + 478 + 1 = 666.

It is not a de Polignac number, because 40972844781 - 2¹⁰ = 40972843757 is a prime.

It is a super-2 number, since 2×40972844781² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40972844789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4052070 + ... + 4062168.

It is an arithmetic number, because the mean of its divisors is an integer number (1361318400).

Almost surely, 2^40972844781 is an apocalyptic number.

It is an amenable number.

40972844781 is a deficient number, since it is larger than the sum of its proper divisors (24370438419).

40972844781 is a wasteful number, since it uses less digits than its factorization.

40972844781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606 (or 10603 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 40972844781 in words is "forty billion, nine hundred seventy-two million, eight hundred forty-four thousand, seven hundred eighty-one".