161210764773 has 24 divisors (see below), whose sum is σ = 233328754776. Its totient is φ = 107257651200.

The previous prime is 161210764753. The next prime is 161210764777. The reversal of 161210764773 is 377467012161.

161210764773 is a `hidden beast` number, since 161 + 2 + 10 + 7 + 6 + 477 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 63846171684 + 97364593089 = 252678^2 + 312033^2 .

It is not a de Polignac number, because 161210764773 - 2¹² = 161210760677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161210764777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16477143 + ... + 16486923.

It is an arithmetic number, because the mean of its divisors is an integer number (9722031449).

Almost surely, 2^161210764773 is an apocalyptic number.

It is an amenable number.

161210764773 is a deficient number, since it is larger than the sum of its proper divisors (72117990003).

161210764773 is a wasteful number, since it uses less digits than its factorization.

161210764773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13285 (or 13282 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The spelling of 161210764773 in words is "one hundred sixty-one billion, two hundred ten million, seven hundred sixty-four thousand, seven hundred seventy-three".