1681437378135 has 16 divisors (see below), whose sum is σ = 2690355943296. Its totient is φ = 896747888928.

The previous prime is 1681437378079. The next prime is 1681437378199. The reversal of 1681437378135 is 5318737341861.

It is not a de Polignac number, because 1681437378135 - 2⁹ = 1681437377623 is a prime.

It is a congruent number.

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, 410869 + ... + 1879278.

It is an arithmetic number, because the mean of its divisors is an integer number (168147246456).

Almost surely, 2^{1681437378135} is an apocalyptic number.

1681437378135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1681437378135 is a deficient number, since it is larger than the sum of its proper divisors (1008918565161).

1681437378135 is a wasteful number, since it uses less digits than its factorization.

1681437378135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339102.

The product of its digits is 10160640, while the sum is 57.

The spelling of 1681437378135 in words is "one trillion, six hundred eighty-one billion, four hundred thirty-seven million, three hundred seventy-eight thousand, one hundred thirty-five".