1538790038890 has 64 divisors (see below), whose sum is σ = 3063878010144. Its totient is φ = 552745202688.

The previous prime is 1538790038879. The next prime is 1538790038893. The reversal of 1538790038890 is 988300978351.

It can be written as a sum of positive squares in 16 ways, for example, as 581725018681 + 957065020209 = 762709^2 + 978297^2 .

It is not an unprimeable number, because it can be changed into a prime (1538790038893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56152672 + ... + 56180068.

Almost surely, 2^{1538790038890} is an apocalyptic number.

1538790038890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1538790038890 is a deficient number, since it is larger than the sum of its proper divisors (1525087971254).

1538790038890 is a wasteful number, since it uses less digits than its factorization.

1538790038890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39131.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 1538790038890 in words is "one trillion, five hundred thirty-eight billion, seven hundred ninety million, thirty-eight thousand, eight hundred ninety".