195921875537 has 2 divisors, whose sum is σ = 195921875538. Its totient is φ = 195921875536.

The previous prime is 195921875509. The next prime is 195921875579. The reversal of 195921875537 is 735578129591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156024210001 + 39897665536 = 394999^2 + 199744^2 .

It is a cyclic number.

It is not a de Polignac number, because 195921875537 - 2⁶ = 195921875473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195921875537.

It is not a weakly prime, because it can be changed into another prime (195921875507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97960937768 + 97960937769.

It is an arithmetic number, because the mean of its divisors is an integer number (97960937769).

Almost surely, 2^195921875537 is an apocalyptic number.

It is an amenable number.

195921875537 is a deficient number, since it is larger than the sum of its proper divisors (1).

195921875537 is an equidigital number, since it uses as much as digits as its factorization.

195921875537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814000, while the sum is 62.

The spelling of 195921875537 in words is "one hundred ninety-five billion, nine hundred twenty-one million, eight hundred seventy-five thousand, five hundred thirty-seven".