1381566001487 has 8 divisors (see below), whose sum is σ = 1580516264736. Its totient is φ = 1183011661152.

The previous prime is 1381566001471. The next prime is 1381566001489. The reversal of 1381566001487 is 7841006651831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1381566001487 - 2⁴ = 1381566001471 is a prime.

It is a super-4 number, since 4×1381566001487⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381566001489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98973248 + ... + 98987205.

It is an arithmetic number, because the mean of its divisors is an integer number (197564533092).

Almost surely, 2^{1381566001487} is an apocalyptic number.

1381566001487 is a deficient number, since it is larger than the sum of its proper divisors (198950263249).

1381566001487 is an equidigital number, since it uses as much as digits as its factorization.

1381566001487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197961457.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 1381566001487 in words is "one trillion, three hundred eighty-one billion, five hundred sixty-six million, one thousand, four hundred eighty-seven".