195540057 has 12 divisors (see below), whose sum is σ = 284480560. Its totient is φ = 129421368.

The previous prime is 195540019. The next prime is 195540061. The reversal of 195540057 is 750045591.

It is not a de Polignac number, because 195540057 - 2⁸ = 195539801 is a prime.

It is a super-4 number, since 4×195540057⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195540067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76903 + ... + 79404.

Almost surely, 2^195540057 is an apocalyptic number.

It is an amenable number.

195540057 is a deficient number, since it is larger than the sum of its proper divisors (88940503).

195540057 is a wasteful number, since it uses less digits than its factorization.

195540057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156452 (or 156449 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 195540057 is about 13983.5638161379. The cubic root of 195540057 is about 580.4238449686.

The spelling of 195540057 in words is "one hundred ninety-five million, five hundred forty thousand, fifty-seven".