17977744038 has 16 divisors (see below), whose sum is σ = 36927258480. Its totient is φ = 5830619616.

The previous prime is 17977744019. The next prime is 17977744039. The reversal of 17977744038 is 83044777971.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17977744039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40490193 + ... + 40490636.

It is an arithmetic number, because the mean of its divisors is an integer number (2307953655).

Almost surely, 2^17977744038 is an apocalyptic number.

17977744038 is an abundant number, since it is smaller than the sum of its proper divisors (18949514442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17977744038 is a wasteful number, since it uses less digits than its factorization.

17977744038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80980871.

The product of its (nonzero) digits is 8297856, while the sum is 57.

The spelling of 17977744038 in words is "seventeen billion, nine hundred seventy-seven million, seven hundred forty-four thousand, thirty-eight".