40017372430643 has 4 divisors (see below), whose sum is σ = 40673394929568. Its totient is φ = 39361349931720.

The previous prime is 40017372430627. The next prime is 40017372430663. The reversal of 40017372430643 is 34603427371004.

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

It is a cyclic number.

It is not a de Polignac number, because 40017372430643 - 2⁴ = 40017372430627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40017372430594 and 40017372430603.

It is not an unprimeable number, because it can be changed into a prime (40017372430603) 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, 328011249371 + ... + 328011249492.

It is an arithmetic number, because the mean of its divisors is an integer number (10168348732392).

Almost surely, 2^{40017372430643} is an apocalyptic number.

40017372430643 is a deficient number, since it is larger than the sum of its proper divisors (656022498925).

40017372430643 is an equidigital number, since it uses as much as digits as its factorization.

40017372430643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656022498924.

The product of its (nonzero) digits is 1016064, while the sum is 44.

The spelling of 40017372430643 in words is "forty trillion, seventeen billion, three hundred seventy-two million, four hundred thirty thousand, six hundred forty-three".