1387583528381 has 16 divisors (see below), whose sum is σ = 1477450316160. Its totient is φ = 1298652833280.

The previous prime is 1387583528371. The next prime is 1387583528407. The reversal of 1387583528381 is 1838253857831.

It is a cyclic number.

It is not a de Polignac number, because 1387583528381 - 2³⁸ = 1112705621437 is a prime.

It is a super-2 number, since 2×1387583528381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387583528321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1902065 + ... + 2528441.

It is an arithmetic number, because the mean of its divisors is an integer number (92340644760).

Almost surely, 2^{1387583528381} is an apocalyptic number.

It is an amenable number.

1387583528381 is a deficient number, since it is larger than the sum of its proper divisors (89866787779).

1387583528381 is a wasteful number, since it uses less digits than its factorization.

1387583528381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627124.

The product of its digits is 38707200, while the sum is 62.

The spelling of 1387583528381 in words is "one trillion, three hundred eighty-seven billion, five hundred eighty-three million, five hundred twenty-eight thousand, three hundred eighty-one".