43722061787 has 4 divisors (see below), whose sum is σ = 45229719120. Its totient is φ = 42214404456.

The previous prime is 43722061763. The next prime is 43722061819. The reversal of 43722061787 is 78716022734.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78716022734 = 2 ⋅39358011367.

It is a cyclic number.

It is not a de Polignac number, because 43722061787 - 2⁶ = 43722061723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43722063787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753828623 + ... + 753828680.

It is an arithmetic number, because the mean of its divisors is an integer number (11307429780).

Almost surely, 2^43722061787 is an apocalyptic number.

43722061787 is a deficient number, since it is larger than the sum of its proper divisors (1507657333).

43722061787 is a wasteful number, since it uses less digits than its factorization.

43722061787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507657332.

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 43722061787 in words is "forty-three billion, seven hundred twenty-two million, sixty-one thousand, seven hundred eighty-seven".