43453661655 has 32 divisors (see below), whose sum is σ = 70373801664. Its totient is φ = 22894350336.

The previous prime is 43453661639. The next prime is 43453661681. The reversal of 43453661655 is 55616635434.

It is not a de Polignac number, because 43453661655 - 2⁴ = 43453661639 is a prime.

It is a super-2 number, since 2×43453661655² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354087 + ... + 460743.

It is an arithmetic number, because the mean of its divisors is an integer number (2199181302).

Almost surely, 2^43453661655 is an apocalyptic number.

43453661655 is a deficient number, since it is larger than the sum of its proper divisors (26920140009).

43453661655 is a wasteful number, since it uses less digits than its factorization.

43453661655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106995.

The product of its digits is 3888000, while the sum is 48.

The spelling of 43453661655 in words is "forty-three billion, four hundred fifty-three million, six hundred sixty-one thousand, six hundred fifty-five".