161366046465 has 64 divisors (see below), whose sum is σ = 285989324544. Its totient is φ = 77191446528.

The previous prime is 161366046437. The next prime is 161366046467. The reversal of 161366046465 is 564640663161.

It is not a de Polignac number, because 161366046465 - 2¹⁹ = 161365522177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161366046467) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1568449 + ... + 1668161.

It is an arithmetic number, because the mean of its divisors is an integer number (4468583196).

Almost surely, 2^161366046465 is an apocalyptic number.

161366046465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161366046465 is a deficient number, since it is larger than the sum of its proper divisors (124623278079).

161366046465 is a wasteful number, since it uses less digits than its factorization.

161366046465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99970.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 161366046465 in words is "one hundred sixty-one billion, three hundred sixty-six million, forty-six thousand, four hundred sixty-five".