40067180781 has 8 divisors (see below), whose sum is σ = 54328380960. Its totient is φ = 26258717232.

The previous prime is 40067180759. The next prime is 40067180831. The reversal of 40067180781 is 18708176004.

It is a happy number.

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

It is not a de Polignac number, because 40067180781 - 2⁷ = 40067180653 is a prime.

It is a super-3 number, since 3×40067180781³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40067180381) 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, 113183950 + ... + 113184303.

It is an arithmetic number, because the mean of its divisors is an integer number (6791047620).

Almost surely, 2^40067180781 is an apocalyptic number.

It is an amenable number.

40067180781 is a deficient number, since it is larger than the sum of its proper divisors (14261200179).

40067180781 is a wasteful number, since it uses less digits than its factorization.

40067180781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226368315.

The product of its (nonzero) digits is 75264, while the sum is 42.

The spelling of 40067180781 in words is "forty billion, sixty-seven million, one hundred eighty thousand, seven hundred eighty-one".