351127807681 has 4 divisors (see below), whose sum is σ = 401288923072. Its totient is φ = 300966692292.

The previous prime is 351127807633. The next prime is 351127807697. The reversal of 351127807681 is 186708721153.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186708721153 = 13177 ⋅14169289.

It is not a de Polignac number, because 351127807681 - 2⁹ = 351127807169 is a prime.

It is a super-2 number, since 2×351127807681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (351127807621) 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, 25080557685 + ... + 25080557698.

It is an arithmetic number, because the mean of its divisors is an integer number (100322230768).

Almost surely, 2^351127807681 is an apocalyptic number.

It is an amenable number.

351127807681 is a deficient number, since it is larger than the sum of its proper divisors (50161115391).

351127807681 is an equidigital number, since it uses as much as digits as its factorization.

351127807681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50161115390.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 351127807681 in words is "three hundred fifty-one billion, one hundred twenty-seven million, eight hundred seven thousand, six hundred eighty-one".