40115554261 has 8 divisors (see below), whose sum is σ = 40267744920. Its totient is φ = 39963560448.

The previous prime is 40115554229. The next prime is 40115554321. The reversal of 40115554261 is 16245551104.

It can be written as a sum of positive squares in 4 ways, for example, as 5211973636 + 34903580625 = 72194^2 + 186825^2 .

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 40115554261 - 2⁵ = 40115554229 is a prime.

It is a super-2 number, since 2×40115554261² (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 (40115554201) 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, 365745 + ... + 462601.

It is an arithmetic number, because the mean of its divisors is an integer number (5033468115).

Almost surely, 2^40115554261 is an apocalyptic number.

It is an amenable number.

40115554261 is a deficient number, since it is larger than the sum of its proper divisors (152190659).

40115554261 is a wasteful number, since it uses less digits than its factorization.

40115554261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98423.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 40115554261 in words is "forty billion, one hundred fifteen million, five hundred fifty-four thousand, two hundred sixty-one".