195499887057 has 6 divisors (see below), whose sum is σ = 282388725762. Its totient is φ = 130333258032.

The previous prime is 195499887053. The next prime is 195499887061. The reversal of 195499887057 is 750788994591.

It is a happy number.

195499887057 is a `hidden beast` number, since 1 + 9 + 5 + 499 + 8 + 87 + 0 + 57 = 666.

It is an interprime number because it is at equal distance from previous prime (195499887053) and next prime (195499887061).

It can be written as a sum of positive squares in only one way, i.e., 130699602576 + 64800284481 = 361524^2 + 254559^2 .

It is not a de Polignac number, because 195499887057 - 2² = 195499887053 is a prime.

It is a super-2 number, since 2×195499887057² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195499887053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10861104828 + ... + 10861104845.

It is an arithmetic number, because the mean of its divisors is an integer number (47064787627).

Almost surely, 2^195499887057 is an apocalyptic number.

It is an amenable number.

195499887057 is a deficient number, since it is larger than the sum of its proper divisors (86888838705).

195499887057 is a wasteful number, since it uses less digits than its factorization.

195499887057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21722209679 (or 21722209676 counting only the distinct ones).

The product of its (nonzero) digits is 228614400, while the sum is 72.

The spelling of 195499887057 in words is "one hundred ninety-five billion, four hundred ninety-nine million, eight hundred eighty-seven thousand, fifty-seven".