1371538450129 has 9 divisors (see below), whose sum is σ = 1374692496411. Its totient is φ = 1368391631880.

The previous prime is 1371538450081. The next prime is 1371538450189. The reversal of 1371538450129 is 9210548351731.

The square root of 1371538450129 is 1171127.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1308225825729 + 63312624400 = 1143777^2 + 251620^2 .

It is not a de Polignac number, because 1371538450129 - 2¹⁹ = 1371537925841 is a prime.

It is a super-2 number, since 2×1371538450129² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1371538450189) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 640605399 + ... + 640607539.

Almost surely, 2^{1371538450129} is an apocalyptic number.

1371538450129 is the 1171127-th square number.

1371538450129 is the 585564-th centered octagonal number.

It is an amenable number.

1371538450129 is a deficient number, since it is larger than the sum of its proper divisors (3154046282).

1371538450129 is an frugal number, since it uses more digits than its factorization.

1371538450129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5376 (or 2688 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

Multiplying 1371538450129 by its sum of digits (49), we get a square (67205384056321 = 8197889²).

The spelling of 1371538450129 in words is "one trillion, three hundred seventy-one billion, five hundred thirty-eight million, four hundred fifty thousand, one hundred twenty-nine".