1494191756851 has 2 divisors, whose sum is σ = 1494191756852. Its totient is φ = 1494191756850.

The previous prime is 1494191756833. The next prime is 1494191756857. The reversal of 1494191756851 is 1586571914941.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1494191756851 - 2⁹ = 1494191756339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1494191756851.

It is not a weakly prime, because it can be changed into another prime (1494191756857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 747095878425 + 747095878426.

It is an arithmetic number, because the mean of its divisors is an integer number (747095878426).

Almost surely, 2^{1494191756851} is an apocalyptic number.

1494191756851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1494191756851 is an equidigital number, since it uses as much as digits as its factorization.

1494191756851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 61.

The spelling of 1494191756851 in words is "one trillion, four hundred ninety-four billion, one hundred ninety-one million, seven hundred fifty-six thousand, eight hundred fifty-one".