40172847863 has 2 divisors, whose sum is σ = 40172847864. Its totient is φ = 40172847862.

The previous prime is 40172847859. The next prime is 40172847929. The reversal of 40172847863 is 36874827104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40172847863 - 2² = 40172847859 is a prime.

It is a super-2 number, since 2×40172847863² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40172847823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20086423931 + 20086423932.

It is an arithmetic number, because the mean of its divisors is an integer number (20086423932).

Almost surely, 2^40172847863 is an apocalyptic number.

40172847863 is a deficient number, since it is larger than the sum of its proper divisors (1).

40172847863 is an equidigital number, since it uses as much as digits as its factorization.

40172847863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 40172847863 in words is "forty billion, one hundred seventy-two million, eight hundred forty-seven thousand, eight hundred sixty-three".