1671049643138 has 16 divisors (see below), whose sum is σ = 2594639070720. Its totient is φ = 806320106400.

The previous prime is 1671049643119. The next prime is 1671049643147. The reversal of 1671049643138 is 8313469401761.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1671049643138.

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, 37515923 + ... + 37560438.

It is an arithmetic number, because the mean of its divisors is an integer number (162164941920).

Almost surely, 2^{1671049643138} is an apocalyptic number.

1671049643138 is a deficient number, since it is larger than the sum of its proper divisors (923589427582).

1671049643138 is a wasteful number, since it uses less digits than its factorization.

1671049643138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75076753.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 1671049643138 in words is "one trillion, six hundred seventy-one billion, forty-nine million, six hundred forty-three thousand, one hundred thirty-eight".