161555647026 has 8 divisors (see below), whose sum is σ = 323111294064. Its totient is φ = 53851882340.

The previous prime is 161555647013. The next prime is 161555647027. The reversal of 161555647026 is 620746555161.

It is a sphenic number, since it is the product of 3 distinct primes.

161555647026 is an admirable number.

It is a super-2 number, since 2×161555647026² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161555647027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13462970580 + ... + 13462970591.

It is an arithmetic number, because the mean of its divisors is an integer number (40388911758).

Almost surely, 2^161555647026 is an apocalyptic number.

161555647026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161555647026 is a wasteful number, since it uses less digits than its factorization.

161555647026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26925941176.

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 161555647026 in words is "one hundred sixty-one billion, five hundred fifty-five million, six hundred forty-seven thousand, twenty-six".