1371420371549 has 2 divisors, whose sum is σ = 1371420371550. Its totient is φ = 1371420371548.

The previous prime is 1371420371471. The next prime is 1371420371561. The reversal of 1371420371549 is 9451730241731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 895985299225 + 475435072324 = 946565^2 + 689518^2 .

It is an emirp because it is prime and its reverse (9451730241731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1371420371549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1371420371569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685710185774 + 685710185775.

It is an arithmetic number, because the mean of its divisors is an integer number (685710185775).

Almost surely, 2^{1371420371549} is an apocalyptic number.

It is an amenable number.

1371420371549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371420371549 is an equidigital number, since it uses as much as digits as its factorization.

1371420371549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 1371420371549 in words is "one trillion, three hundred seventy-one billion, four hundred twenty million, three hundred seventy-one thousand, five hundred forty-nine".