43540555553 has 32 divisors (see below), whose sum is σ = 51134976000. Its totient is φ = 36649134720.

The previous prime is 43540555549. The next prime is 43540555571. The reversal of 43540555553 is 35555504534.

It is not a de Polignac number, because 43540555553 - 2² = 43540555549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43540555753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7944068 + ... + 7949546.

It is an arithmetic number, because the mean of its divisors is an integer number (1597968000).

Almost surely, 2^43540555553 is an apocalyptic number.

It is an amenable number.

43540555553 is a deficient number, since it is larger than the sum of its proper divisors (7594420447).

43540555553 is a wasteful number, since it uses less digits than its factorization.

43540555553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6365.

The product of its (nonzero) digits is 2250000, while the sum is 44.

The spelling of 43540555553 in words is "forty-three billion, five hundred forty million, five hundred fifty-five thousand, five hundred fifty-three".