40409781033 has 8 divisors (see below), whose sum is σ = 53933111200. Its totient is φ = 26913152448.

The previous prime is 40409781029. The next prime is 40409781053. The reversal of 40409781033 is 33018790404.

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

It is not a de Polignac number, because 40409781033 - 2² = 40409781029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40409780982 and 40409781000.

It is not an unprimeable number, because it can be changed into a prime (40409781053) 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, 6671863 + ... + 6677916.

It is an arithmetic number, because the mean of its divisors is an integer number (6741638900).

Almost surely, 2^40409781033 is an apocalyptic number.

It is an amenable number.

40409781033 is a deficient number, since it is larger than the sum of its proper divisors (13523330167).

40409781033 is a wasteful number, since it uses less digits than its factorization.

40409781033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13350791.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 40409781033 in words is "forty billion, four hundred nine million, seven hundred eighty-one thousand, thirty-three".