6319378440691 has 4 divisors (see below), whose sum is σ = 6319673884384. Its totient is φ = 6319082997000.

The previous prime is 6319378440677. The next prime is 6319378440703. The reversal of 6319378440691 is 1960448739136.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6319378440691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6319378440091) 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, 147689760 + ... + 147732541.

It is an arithmetic number, because the mean of its divisors is an integer number (1579918471096).

Almost surely, 2^{6319378440691} is an apocalyptic number.

6319378440691 is a deficient number, since it is larger than the sum of its proper divisors (295443693).

6319378440691 is a wasteful number, since it uses less digits than its factorization.

6319378440691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295443692.

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 6319378440691 in words is "six trillion, three hundred nineteen billion, three hundred seventy-eight million, four hundred forty thousand, six hundred ninety-one".