165772534825 has 6 divisors (see below), whose sum is σ = 205557943214. Its totient is φ = 132618027840.

The previous prime is 165772534801. The next prime is 165772534831. The reversal of 165772534825 is 528435277561.

It can be written as a sum of positive squares in 3 ways, for example, as 396925929 + 165375608896 = 19923^2 + 406664^2 .

It is not a de Polignac number, because 165772534825 - 2²¹ = 165770437673 is a prime.

It is a Duffinian number.

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, 3315450672 + ... + 3315450721.

Almost surely, 2^165772534825 is an apocalyptic number.

It is an amenable number.

165772534825 is a deficient number, since it is larger than the sum of its proper divisors (39785408389).

165772534825 is an equidigital number, since it uses as much as digits as its factorization.

165772534825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6630901403 (or 6630901398 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 55.

The spelling of 165772534825 in words is "one hundred sixty-five billion, seven hundred seventy-two million, five hundred thirty-four thousand, eight hundred twenty-five".