1538735031890 has 32 divisors (see below), whose sum is σ = 3331997665920. Its totient is φ = 499799649024.

The previous prime is 1538735031881. The next prime is 1538735031937. The reversal of 1538735031890 is 981305378351.

It is a super-4 number, since 4×1538735031890⁴ (a number of 50 digits) contains 4444 as substring.

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 15 ways as a sum of consecutive naturals, for example, 578470487 + ... + 578473146.

It is an arithmetic number, because the mean of its divisors is an integer number (104124927060).

Almost surely, 2^{1538735031890} is an apocalyptic number.

1538735031890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1538735031890 is an abundant number, since it is smaller than the sum of its proper divisors (1793262634030).

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

1538735031890 is a wasteful number, since it uses less digits than its factorization.

1538735031890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156943666.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 1538735031890 in words is "one trillion, five hundred thirty-eight billion, seven hundred thirty-five million, thirty-one thousand, eight hundred ninety".