40547297647 has 16 divisors (see below), whose sum is σ = 41415657120. Its totient is φ = 39685396608.

The previous prime is 40547297591. The next prime is 40547297653. The reversal of 40547297647 is 74679274504.

It is a cyclic number.

It is not a de Polignac number, because 40547297647 - 2⁷ = 40547297519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40547297657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15856093 + ... + 15858649.

It is an arithmetic number, because the mean of its divisors is an integer number (2588478570).

Almost surely, 2^40547297647 is an apocalyptic number.

40547297647 is a deficient number, since it is larger than the sum of its proper divisors (868359473).

40547297647 is a wasteful number, since it uses less digits than its factorization.

40547297647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690.

The product of its (nonzero) digits is 11854080, while the sum is 55.

The spelling of 40547297647 in words is "forty billion, five hundred forty-seven million, two hundred ninety-seven thousand, six hundred forty-seven".