1995787340851 has 4 divisors (see below), whose sum is σ = 1996719518304. Its totient is φ = 1994855163400.

The previous prime is 1995787340809. The next prime is 1995787340977. The reversal of 1995787340851 is 1580437875991.

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

It is a cyclic number.

It is not a de Polignac number, because 1995787340851 - 2²⁵ = 1995753786419 is a prime.

It is a super-2 number, since 2×1995787340851² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1995787340251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466085515 + ... + 466089796.

It is an arithmetic number, because the mean of its divisors is an integer number (499179879576).

Almost surely, 2^{1995787340851} is an apocalyptic number.

1995787340851 is a deficient number, since it is larger than the sum of its proper divisors (932177453).

1995787340851 is an equidigital number, since it uses as much as digits as its factorization.

1995787340851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932177452.

The product of its (nonzero) digits is 76204800, while the sum is 67.

The spelling of 1995787340851 in words is "one trillion, nine hundred ninety-five billion, seven hundred eighty-seven million, three hundred forty thousand, eight hundred fifty-one".