1377537901389 has 24 divisors (see below), whose sum is σ = 2142884398200. Its totient is φ = 847696776192.

The previous prime is 1377537901351. The next prime is 1377537901391. The reversal of 1377537901389 is 9831097357731.

1377537901389 is a `hidden beast` number, since 1 + 3 + 7 + 7 + 537 + 9 + 0 + 13 + 89 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 465044891364 + 912493010025 = 681942^2 + 955245^2 .

It is not a de Polignac number, because 1377537901389 - 2²³ = 1377529512781 is a prime.

It is a super-2 number, since 2×1377537901389² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377537901339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6642817 + ... + 6847049.

It is an arithmetic number, because the mean of its divisors is an integer number (89286849925).

Almost surely, 2^{1377537901389} is an apocalyptic number.

It is an amenable number.

1377537901389 is a deficient number, since it is larger than the sum of its proper divisors (765346496811).

1377537901389 is a wasteful number, since it uses less digits than its factorization.

1377537901389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261901 (or 261898 counting only the distinct ones).

The product of its (nonzero) digits is 30005640, while the sum is 63.

The spelling of 1377537901389 in words is "one trillion, three hundred seventy-seven billion, five hundred thirty-seven million, nine hundred one thousand, three hundred eighty-nine".