15801381355 has 16 divisors (see below), whose sum is σ = 19414280160. Its totient is φ = 12339710208.

The previous prime is 15801381353. The next prime is 15801381359. The reversal of 15801381355 is 55318310851.

It is a cyclic number.

It is not a de Polignac number, because 15801381355 - 2¹ = 15801381353 is a prime.

It is a super-2 number, since 2×15801381355² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15801381353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351391 + ... + 393799.

It is an arithmetic number, because the mean of its divisors is an integer number (1213392510).

Almost surely, 2^15801381355 is an apocalyptic number.

15801381355 is a deficient number, since it is larger than the sum of its proper divisors (3612898805).

15801381355 is a wasteful number, since it uses less digits than its factorization.

15801381355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44190.

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 15801381355 in words is "fifteen billion, eight hundred one million, three hundred eighty-one thousand, three hundred fifty-five".