40618553 has 2 divisors, whose sum is σ = 40618554. Its totient is φ = 40618552.

The previous prime is 40618541. The next prime is 40618573. The reversal of 40618553 is 35581604.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32398864 + 8219689 = 5692^2 + 2867^2 .

It is a cyclic number.

It is not a de Polignac number, because 40618553 - 2¹⁰ = 40617529 is a prime.

It is not a weakly prime, because it can be changed into another prime (40618573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20309276 + 20309277.

It is an arithmetic number, because the mean of its divisors is an integer number (20309277).

Almost surely, 2^40618553 is an apocalyptic number.

It is an amenable number.

40618553 is a deficient number, since it is larger than the sum of its proper divisors (1).

40618553 is an equidigital number, since it uses as much as digits as its factorization.

40618553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 40618553 is about 6373.2686276353. The cubic root of 40618553 is about 343.7490310496.

The spelling of 40618553 in words is "forty million, six hundred eighteen thousand, five hundred fifty-three".