40381088261 has 6 divisors (see below), whose sum is σ = 42896173650. Its totient is φ = 38005729856.

The previous prime is 40381088243. The next prime is 40381088269. The reversal of 40381088261 is 16288018304.

It can be written as a sum of positive squares in 3 ways, for example, as 12452328100 + 27928760161 = 111590^2 + 167119^2 .

It is not a de Polignac number, because 40381088261 - 2²⁶ = 40313979397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40381088269) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69863186 + ... + 69863763.

It is an arithmetic number, because the mean of its divisors is an integer number (7149362275).

Almost surely, 2^40381088261 is an apocalyptic number.

It is an amenable number.

40381088261 is a deficient number, since it is larger than the sum of its proper divisors (2515085389).

40381088261 is a wasteful number, since it uses less digits than its factorization.

40381088261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139726983 (or 139726966 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 40381088261 in words is "forty billion, three hundred eighty-one million, eighty-eight thousand, two hundred sixty-one".