1406331798857 has 2 divisors, whose sum is σ = 1406331798858. Its totient is φ = 1406331798856.

The previous prime is 1406331798803. The next prime is 1406331798877. The reversal of 1406331798857 is 7588971336041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1239773129401 + 166558669456 = 1113451^2 + 408116^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406331798857 - 2¹² = 1406331794761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1406331798857.

It is not a weakly prime, because it can be changed into another prime (1406331798877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703165899428 + 703165899429.

It is an arithmetic number, because the mean of its divisors is an integer number (703165899429).

Almost surely, 2^{1406331798857} is an apocalyptic number.

It is an amenable number.

1406331798857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406331798857 is an equidigital number, since it uses as much as digits as its factorization.

1406331798857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 1406331798857 in words is "one trillion, four hundred six billion, three hundred thirty-one million, seven hundred ninety-eight thousand, eight hundred fifty-seven".