17977489946 has 16 divisors (see below), whose sum is σ = 29053556448. Its totient is φ = 8293590000.

The previous prime is 17977489927. The next prime is 17977489951. The reversal of 17977489946 is 64998477971.

It is a self number, because there is not a number n which added to its sum of digits gives 17977489946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95060 + ... + 212111.

It is an arithmetic number, because the mean of its divisors is an integer number (1815847278).

Almost surely, 2^17977489946 is an apocalyptic number.

17977489946 is a deficient number, since it is larger than the sum of its proper divisors (11076066502).

17977489946 is a wasteful number, since it uses less digits than its factorization.

17977489946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309437.

The product of its digits is 192036096, while the sum is 71.

The spelling of 17977489946 in words is "seventeen billion, nine hundred seventy-seven million, four hundred eighty-nine thousand, nine hundred forty-six".