43026438647642 has 4 divisors (see below), whose sum is σ = 64539657971466. Its totient is φ = 21513219323820.

The previous prime is 43026438647503. The next prime is 43026438647693. The reversal of 43026438647642 is 24674683462034.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42124396489561 + 902042158081 = 6490331^2 + 949759^2 .

It is a super-2 number, since 2×43026438647642² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10756609661909 + ... + 10756609661912.

Almost surely, 2^{43026438647642} is an apocalyptic number.

43026438647642 is a deficient number, since it is larger than the sum of its proper divisors (21513219323824).

43026438647642 is a wasteful number, since it uses less digits than its factorization.

43026438647642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21513219323823.

The product of its (nonzero) digits is 111476736, while the sum is 59.

The spelling of 43026438647642 in words is "forty-three trillion, twenty-six billion, four hundred thirty-eight million, six hundred forty-seven thousand, six hundred forty-two".