165760578038416 has 45 divisors (see below), whose sum is σ = 328144514447491. Its totient is φ = 81115694132576.

The previous prime is 165760578038411. The next prime is 165760578038453. The reversal of 165760578038416 is 614830875067561.

The square root of 165760578038416 is 12874804.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165760578038411) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2420428911 + ... + 2420497393.

Almost surely, 2^{165760578038416} is an apocalyptic number.

165760578038416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

165760578038416 is the 12874804-th square number.

It is an amenable number.

165760578038416 is a deficient number, since it is larger than the sum of its proper divisors (162383936409075).

165760578038416 is an frugal number, since it uses more digits than its factorization.

165760578038416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137068 (or 68532 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 67.

The spelling of 165760578038416 in words is "one hundred sixty-five trillion, seven hundred sixty billion, five hundred seventy-eight million, thirty-eight thousand, four hundred sixteen".