1549390144238 has 32 divisors (see below), whose sum is σ = 2389181145120. Its totient is φ = 753131312640.

The previous prime is 1549390144219. The next prime is 1549390144261. The reversal of 1549390144238 is 8324410939451.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1549390144238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133642970 + ... + 133654562.

It is an arithmetic number, because the mean of its divisors is an integer number (74661910785).

Almost surely, 2^{1549390144238} is an apocalyptic number.

1549390144238 is a deficient number, since it is larger than the sum of its proper divisors (839791000882).

1549390144238 is a wasteful number, since it uses less digits than its factorization.

1549390144238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17252.

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 1549390144238 in words is "one trillion, five hundred forty-nine billion, three hundred ninety million, one hundred forty-four thousand, two hundred thirty-eight".