1791037855951 has 4 divisors (see below), whose sum is σ = 1791043230400. Its totient is φ = 1791032481504.

The previous prime is 1791037855927. The next prime is 1791037855987. The reversal of 1791037855951 is 1595587301971.

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 1791037855951 - 2¹¹ = 1791037853903 is a prime.

It is a super-2 number, since 2×1791037855951² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1791037855951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1791037855991) 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, 2151786 + ... + 2865703.

It is an arithmetic number, because the mean of its divisors is an integer number (447760807600).

Almost surely, 2^{1791037855951} is an apocalyptic number.

1791037855951 is a deficient number, since it is larger than the sum of its proper divisors (5374449).

1791037855951 is an equidigital number, since it uses as much as digits as its factorization.

1791037855951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5374448.

The product of its (nonzero) digits is 11907000, while the sum is 61.

The spelling of 1791037855951 in words is "one trillion, seven hundred ninety-one billion, thirty-seven million, eight hundred fifty-five thousand, nine hundred fifty-one".