1401626745797 has 2 divisors, whose sum is σ = 1401626745798. Its totient is φ = 1401626745796.

The previous prime is 1401626745793. The next prime is 1401626745809. The reversal of 1401626745797 is 7975476261041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1054223776516 + 347402969281 = 1026754^2 + 589409^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401626745797 - 2² = 1401626745793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401626745793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700813372898 + 700813372899.

It is an arithmetic number, because the mean of its divisors is an integer number (700813372899).

Almost surely, 2^{1401626745797} is an apocalyptic number.

It is an amenable number.

1401626745797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401626745797 is an equidigital number, since it uses as much as digits as its factorization.

1401626745797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 1401626745797 in words is "one trillion, four hundred one billion, six hundred twenty-six million, seven hundred forty-five thousand, seven hundred ninety-seven".