1881378035990 has 16 divisors (see below), whose sum is σ = 3405190304880. Its totient is φ = 748393472160.

The previous prime is 1881378035969. The next prime is 1881378036017. The reversal of 1881378035990 is 995308731881.

It is a congruent number.

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, 519715880 + ... + 519719499.

It is an arithmetic number, because the mean of its divisors is an integer number (212824394055).

Almost surely, 2^{1881378035990} is an apocalyptic number.

1881378035990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1881378035990 is a deficient number, since it is larger than the sum of its proper divisors (1523812268890).

1881378035990 is a wasteful number, since it uses less digits than its factorization.

1881378035990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039435567.

The product of its (nonzero) digits is 13063680, while the sum is 62.

The spelling of 1881378035990 in words is "one trillion, eight hundred eighty-one billion, three hundred seventy-eight million, thirty-five thousand, nine hundred ninety".