40165251631 has 2 divisors, whose sum is σ = 40165251632. Its totient is φ = 40165251630.

The previous prime is 40165251611. The next prime is 40165251677. The reversal of 40165251631 is 13615256104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40165251631 - 2¹¹ = 40165249583 is a prime.

It is a super-2 number, since 2×40165251631² (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 (40165251611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20082625815 + 20082625816.

It is an arithmetic number, because the mean of its divisors is an integer number (20082625816).

Almost surely, 2^40165251631 is an apocalyptic number.

40165251631 is a deficient number, since it is larger than the sum of its proper divisors (1).

40165251631 is an equidigital number, since it uses as much as digits as its factorization.

40165251631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 40165251631 in words is "forty billion, one hundred sixty-five million, two hundred fifty-one thousand, six hundred thirty-one".