40381102649 has 2 divisors, whose sum is σ = 40381102650. Its totient is φ = 40381102648.

The previous prime is 40381102639. The next prime is 40381102679. The reversal of 40381102649 is 94620118304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24174030400 + 16207072249 = 155480^2 + 127307^2 .

It is a cyclic number.

It is not a de Polignac number, because 40381102649 - 2⁴ = 40381102633 is a prime.

It is a super-2 number, since 2×40381102649² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40381102639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20190551324 + 20190551325.

It is an arithmetic number, because the mean of its divisors is an integer number (20190551325).

Almost surely, 2^40381102649 is an apocalyptic number.

It is an amenable number.

40381102649 is a deficient number, since it is larger than the sum of its proper divisors (1).

40381102649 is an equidigital number, since it uses as much as digits as its factorization.

40381102649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 40381102649 in words is "forty billion, three hundred eighty-one million, one hundred two thousand, six hundred forty-nine".