40637028668 has 6 divisors (see below), whose sum is σ = 71114800176. Its totient is φ = 20318514332.

The previous prime is 40637028647. The next prime is 40637028673. The reversal of 40637028668 is 86682073604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5079628580 + ... + 5079628587.

It is an arithmetic number, because the mean of its divisors is an integer number (11852466696).

Almost surely, 2^40637028668 is an apocalyptic number.

It is an amenable number.

40637028668 is a deficient number, since it is larger than the sum of its proper divisors (30477771508).

40637028668 is a wasteful number, since it uses less digits than its factorization.

40637028668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10159257171 (or 10159257169 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 40637028668 in words is "forty billion, six hundred thirty-seven million, twenty-eight thousand, six hundred sixty-eight".