351278840389 has 4 divisors (see below), whose sum is σ = 356521808224. Its totient is φ = 346035872556.

The previous prime is 351278840359. The next prime is 351278840411. The reversal of 351278840389 is 983048872153.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 351278840389 - 2⁷ = 351278840261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351278840359) 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, 2621483817 + ... + 2621483950.

It is an arithmetic number, because the mean of its divisors is an integer number (89130452056).

Almost surely, 2^351278840389 is an apocalyptic number.

It is an amenable number.

351278840389 is a deficient number, since it is larger than the sum of its proper divisors (5242967835).

351278840389 is an equidigital number, since it uses as much as digits as its factorization.

351278840389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242967834.

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 351278840389 in words is "three hundred fifty-one billion, two hundred seventy-eight million, eight hundred forty thousand, three hundred eighty-nine".