195437137906 has 4 divisors (see below), whose sum is σ = 293155706862. Its totient is φ = 97718568952.

The previous prime is 195437137897. The next prime is 195437137967. The reversal of 195437137906 is 609731734591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 195421464225 + 15673681 = 442065^2 + 3959^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48859284475 + ... + 48859284478.

Almost surely, 2^195437137906 is an apocalyptic number.

195437137906 is a deficient number, since it is larger than the sum of its proper divisors (97718568956).

195437137906 is an equidigital number, since it uses as much as digits as its factorization.

195437137906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97718568955.

The product of its (nonzero) digits is 4286520, while the sum is 55.

The spelling of 195437137906 in words is "one hundred ninety-five billion, four hundred thirty-seven million, one hundred thirty-seven thousand, nine hundred six".