40555655501 has 2 divisors, whose sum is σ = 40555655502. Its totient is φ = 40555655500.

The previous prime is 40555655479. The next prime is 40555655513. The reversal of 40555655501 is 10555655504.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23998657225 + 16556998276 = 154915^2 + 128674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40555655501 is a prime.

It is a super-2 number, since 2×40555655501² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40555655521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20277827750 + 20277827751.

It is an arithmetic number, because the mean of its divisors is an integer number (20277827751).

Almost surely, 2^40555655501 is an apocalyptic number.

It is an amenable number.

40555655501 is a deficient number, since it is larger than the sum of its proper divisors (1).

40555655501 is an equidigital number, since it uses as much as digits as its factorization.

40555655501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 375000, while the sum is 41.

The spelling of 40555655501 in words is "forty billion, five hundred fifty-five million, six hundred fifty-five thousand, five hundred one".