40426540781 has 8 divisors (see below), whose sum is σ = 44104075104. Its totient is φ = 36749405520.

The previous prime is 40426540771. The next prime is 40426540783. The reversal of 40426540781 is 18704562404.

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 40426540781 - 2²² = 40422346477 is a prime.

It is a super-2 number, since 2×40426540781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40426540783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136370 + ... + 315356.

It is an arithmetic number, because the mean of its divisors is an integer number (5513009388).

Almost surely, 2^40426540781 is an apocalyptic number.

It is an amenable number.

40426540781 is a deficient number, since it is larger than the sum of its proper divisors (3677534323).

40426540781 is a wasteful number, since it uses less digits than its factorization.

40426540781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199531.

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 40426540781 in words is "forty billion, four hundred twenty-six million, five hundred forty thousand, seven hundred eighty-one".