1381101898777 has 2 divisors, whose sum is σ = 1381101898778. Its totient is φ = 1381101898776.

The previous prime is 1381101898739. The next prime is 1381101898783. The reversal of 1381101898777 is 7778981011831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1186321785856 + 194780112921 = 1089184^2 + 441339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381101898777 - 2¹¹ = 1381101896729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1381101898717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690550949388 + 690550949389.

It is an arithmetic number, because the mean of its divisors is an integer number (690550949389).

Almost surely, 2^{1381101898777} is an apocalyptic number.

It is an amenable number.

1381101898777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381101898777 is an equidigital number, since it uses as much as digits as its factorization.

1381101898777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4741632, while the sum is 61.

The spelling of 1381101898777 in words is "one trillion, three hundred eighty-one billion, one hundred one million, eight hundred ninety-eight thousand, seven hundred seventy-seven".