40663256261 has 8 divisors (see below), whose sum is σ = 40714400664. Its totient is φ = 40612147200.

The previous prime is 40663256251. The next prime is 40663256269. The reversal of 40663256261 is 16265236604.

It is a happy number.

40663256261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6185822500 + 34477433761 = 78650^2 + 185681^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40663256261 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 (40663256269) 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, 2837831 + ... + 2852123.

It is an arithmetic number, because the mean of its divisors is an integer number (5089300083).

Almost surely, 2^40663256261 is an apocalyptic number.

It is an amenable number.

40663256261 is a deficient number, since it is larger than the sum of its proper divisors (51144403).

40663256261 is a wasteful number, since it uses less digits than its factorization.

40663256261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17671.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 40663256261 in words is "forty billion, six hundred sixty-three million, two hundred fifty-six thousand, two hundred sixty-one".