40644525143 has 4 divisors (see below), whose sum is σ = 40661949048. Its totient is φ = 40627101240.

The previous prime is 40644525139. The next prime is 40644525211. The reversal of 40644525143 is 34152544604.

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 40644525143 - 2² = 40644525139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40644525097 and 40644525106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40644525133) 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, 8708453 + ... + 8713118.

It is an arithmetic number, because the mean of its divisors is an integer number (10165487262).

Almost surely, 2^40644525143 is an apocalyptic number.

40644525143 is a deficient number, since it is larger than the sum of its proper divisors (17423905).

40644525143 is a wasteful number, since it uses less digits than its factorization.

40644525143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17423904.

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 40644525143 in words is "forty billion, six hundred forty-four million, five hundred twenty-five thousand, one hundred forty-three".