50978847691 has 2 divisors, whose sum is σ = 50978847692. Its totient is φ = 50978847690.

The previous prime is 50978847683. The next prime is 50978847701. The reversal of 50978847691 is 19674887905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50978847691 - 2³ = 50978847683 is a prime.

It is not a weakly prime, because it can be changed into another prime (50978847991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25489423845 + 25489423846.

It is an arithmetic number, because the mean of its divisors is an integer number (25489423846).

Almost surely, 2^50978847691 is an apocalyptic number.

50978847691 is a deficient number, since it is larger than the sum of its proper divisors (1).

50978847691 is an equidigital number, since it uses as much as digits as its factorization.

50978847691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 64.

The spelling of 50978847691 in words is "fifty billion, nine hundred seventy-eight million, eight hundred forty-seven thousand, six hundred ninety-one".