40187449751 has 2 divisors, whose sum is σ = 40187449752. Its totient is φ = 40187449750.

The previous prime is 40187449747. The next prime is 40187449777. The reversal of 40187449751 is 15794478104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40187449751 - 2² = 40187449747 is a prime.

It is a super-2 number, since 2×40187449751² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40187449751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40187449721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20093724875 + 20093724876.

It is an arithmetic number, because the mean of its divisors is an integer number (20093724876).

Almost surely, 2^40187449751 is an apocalyptic number.

40187449751 is a deficient number, since it is larger than the sum of its proper divisors (1).

40187449751 is an equidigital number, since it uses as much as digits as its factorization.

40187449751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 40187449751 in words is "forty billion, one hundred eighty-seven million, four hundred forty-nine thousand, seven hundred fifty-one".