165263455507450 has 12 divisors (see below), whose sum is σ = 307390027243950. Its totient is φ = 66105382202960.

The previous prime is 165263455507417. The next prime is 165263455507517. The reversal of 165263455507450 is 54705554362561.

It can be written as a sum of positive squares in 3 ways, for example, as 116000589907449 + 49262865600001 = 10770357^2 + 7018751^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1652634555025 + ... + 1652634555124.

Almost surely, 2^{165263455507450} is an apocalyptic number.

165263455507450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165263455507450 is a deficient number, since it is larger than the sum of its proper divisors (142126571736500).

165263455507450 is a wasteful number, since it uses less digits than its factorization.

165263455507450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305269110161 (or 3305269110156 counting only the distinct ones).

The product of its (nonzero) digits is 75600000, while the sum is 58.

The spelling of 165263455507450 in words is "one hundred sixty-five trillion, two hundred sixty-three billion, four hundred fifty-five million, five hundred seven thousand, four hundred fifty".