18461497449938 has 16 divisors (see below), whose sum is σ = 27700616623680. Its totient is φ = 9227958822000.

The previous prime is 18461497449911. The next prime is 18461497449959. The reversal of 18461497449938 is 83994479416481.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194384363 + ... + 194479313.

It is an arithmetic number, because the mean of its divisors is an integer number (1731288538980).

Almost surely, 2^{18461497449938} is an apocalyptic number.

18461497449938 is a deficient number, since it is larger than the sum of its proper divisors (9239119173742).

18461497449938 is a wasteful number, since it uses less digits than its factorization.

18461497449938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123313.

The product of its digits is 1504935936, while the sum is 77.

The spelling of 18461497449938 in words is "eighteen trillion, four hundred sixty-one billion, four hundred ninety-seven million, four hundred forty-nine thousand, nine hundred thirty-eight".