43640161354 has 4 divisors (see below), whose sum is σ = 65460242034. Its totient is φ = 21820080676.

The previous prime is 43640161333. The next prime is 43640161417. The reversal of 43640161354 is 45316104634.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45316104634 = 2 ⋅22658052317.

It can be written as a sum of positive squares in only one way, i.e., 36110260729 + 7529900625 = 190027^2 + 86775^2 .

It is a super-3 number, since 3×43640161354³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10910040337 + ... + 10910040340.

Almost surely, 2^43640161354 is an apocalyptic number.

43640161354 is a deficient number, since it is larger than the sum of its proper divisors (21820080680).

43640161354 is a wasteful number, since it uses less digits than its factorization.

43640161354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21820080679.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 43640161354 its reverse (45316104634), we get a palindrome (88956265988).

The spelling of 43640161354 in words is "forty-three billion, six hundred forty million, one hundred sixty-one thousand, three hundred fifty-four".