1781985981314 has 32 divisors (see below), whose sum is σ = 3341112278400. Its totient is φ = 692495447040.

The previous prime is 1781985981247. The next prime is 1781985981329. The reversal of 1781985981314 is 4131895891871.

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, 14813279 + ... + 14933090.

It is an arithmetic number, because the mean of its divisors is an integer number (104409758700).

Almost surely, 2^{1781985981314} is an apocalyptic number.

1781985981314 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1781985981314 is a deficient number, since it is larger than the sum of its proper divisors (1559126297086).

1781985981314 is a wasteful number, since it uses less digits than its factorization.

1781985981314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29746778.

The product of its digits is 17418240, while the sum is 65.

The spelling of 1781985981314 in words is "one trillion, seven hundred eighty-one billion, nine hundred eighty-five million, nine hundred eighty-one thousand, three hundred fourteen".