161271404048 has 40 divisors (see below), whose sum is σ = 326628255168. Its totient is φ = 76992705152.

The previous prime is 161271404017. The next prime is 161271404053. The reversal of 161271404048 is 840404172161.

It is a super-2 number, since 2×161271404048² (a number of 23 digits) contains 22 as substring.

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, 182015 + ... + 596382.

Almost surely, 2^161271404048 is an apocalyptic number.

It is an amenable number.

161271404048 is an abundant number, since it is smaller than the sum of its proper divisors (165356851120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161271404048 is a wasteful number, since it uses less digits than its factorization.

161271404048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778991 (or 778985 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 161271404048 in words is "one hundred sixty-one billion, two hundred seventy-one million, four hundred four thousand, forty-eight".