40218083261 has 4 divisors (see below), whose sum is σ = 40386360000. Its totient is φ = 40049806524.

The previous prime is 40218083249. The next prime is 40218083273. The reversal of 40218083261 is 16238081204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (40218083249) and next prime (40218083273).

It is a cyclic number.

It is not a de Polignac number, because 40218083261 - 2¹⁰ = 40218082237 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 (40218083201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84138011 + ... + 84138488.

It is an arithmetic number, because the mean of its divisors is an integer number (10096590000).

Almost surely, 2^40218083261 is an apocalyptic number.

It is an amenable number.

40218083261 is a deficient number, since it is larger than the sum of its proper divisors (168276739).

40218083261 is a wasteful number, since it uses less digits than its factorization.

40218083261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168276738.

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 40218083261 in words is "forty billion, two hundred eighteen million, eighty-three thousand, two hundred sixty-one".