1000015381581 has 8 divisors (see below), whose sum is σ = 1334541160800. Its totient is φ = 666083261712.

The previous prime is 1000015381507. The next prime is 1000015381643. The reversal of 1000015381581 is 1851835100001.

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

It is not a de Polignac number, because 1000015381581 - 2²³ = 1000006992973 is a prime.

It is a super-2 number, since 2×1000015381581² (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 (1000015381081) 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, 148410906 + ... + 148417643.

It is an arithmetic number, because the mean of its divisors is an integer number (166817645100).

Almost surely, 2^{1000015381581} is an apocalyptic number.

It is an amenable number.

1000015381581 is a deficient number, since it is larger than the sum of its proper divisors (334525779219).

1000015381581 is a wasteful number, since it uses less digits than its factorization.

1000015381581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296829675.

The product of its (nonzero) digits is 4800, while the sum is 33.

The spelling of 1000015381581 in words is "one trillion, fifteen million, three hundred eighty-one thousand, five hundred eighty-one".