161012853638 has 16 divisors (see below), whose sum is σ = 297254499360. Its totient is φ = 63697392576.

The previous prime is 161012853629. The next prime is 161012853649. The reversal of 161012853638 is 836358210161.

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, 442342823 + ... + 442343186.

It is an arithmetic number, because the mean of its divisors is an integer number (18578406210).

Almost surely, 2^161012853638 is an apocalyptic number.

161012853638 is a deficient number, since it is larger than the sum of its proper divisors (136241645722).

161012853638 is a wasteful number, since it uses less digits than its factorization.

161012853638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884686031.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 161012853638 in words is "one hundred sixty-one billion, twelve million, eight hundred fifty-three thousand, six hundred thirty-eight".