1490901621838 has 16 divisors (see below), whose sum is σ = 2241014209920. Its totient is φ = 743898065400.

The previous prime is 1490901621757. The next prime is 1490901621889. The reversal of 1490901621838 is 8381261090941.

It is a super-3 number, since 3×1490901621838³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2244153 + ... + 2831611.

It is an arithmetic number, because the mean of its divisors is an integer number (140063388120).

Almost surely, 2^{1490901621838} is an apocalyptic number.

1490901621838 is a deficient number, since it is larger than the sum of its proper divisors (750112588082).

1490901621838 is a wasteful number, since it uses less digits than its factorization.

1490901621838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590103.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 1490901621838 in words is "one trillion, four hundred ninety billion, nine hundred one million, six hundred twenty-one thousand, eight hundred thirty-eight".