40177889649 has 20 divisors (see below), whose sum is σ = 63177710640. Its totient is φ = 25375508280.

The previous prime is 40177889629. The next prime is 40177889651. The reversal of 40177889649 is 94698877104.

It is not a de Polignac number, because 40177889649 - 2¹⁵ = 40177856881 is a prime.

It is a super-2 number, since 2×40177889649² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40177889629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13051707 + ... + 13054784.

It is an arithmetic number, because the mean of its divisors is an integer number (3158885532).

Almost surely, 2^40177889649 is an apocalyptic number.

It is an amenable number.

40177889649 is a deficient number, since it is larger than the sum of its proper divisors (22999820991).

40177889649 is a wasteful number, since it uses less digits than its factorization.

40177889649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26106522 (or 26106513 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 40177889649 in words is "forty billion, one hundred seventy-seven million, eight hundred eighty-nine thousand, six hundred forty-nine".