161550404046440 has 32 divisors (see below), whose sum is σ = 364077531379080. Its totient is φ = 64515428769792.

The previous prime is 161550404046439. The next prime is 161550404046443. The reversal of 161550404046440 is 44640404055161.

161550404046440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 85566163039204 + 75984241007236 = 9250198^2 + 8716894^2 .

It is a junction number, because it is equal to n+sod(n) for n = 161550404046391 and 161550404046400.

It is not an unprimeable number, because it can be changed into a prime (161550404046443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3272876537 + ... + 3272925896.

Almost surely, 2^{161550404046440} is an apocalyptic number.

161550404046440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161550404046440 is an abundant number, since it is smaller than the sum of its proper divisors (202527127332640).

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

161550404046440 is a wasteful number, since it uses less digits than its factorization.

161550404046440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6545803061 (or 6545803057 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 161550404046440 in words is "one hundred sixty-one trillion, five hundred fifty billion, four hundred four million, forty-six thousand, four hundred forty".