15542801081 has 8 divisors (see below), whose sum is σ = 15645998664. Its totient is φ = 15439656960.

The previous prime is 15542801051. The next prime is 15542801119. The reversal of 15542801081 is 18010824551.

It can be written as a sum of positive squares in 4 ways, for example, as 6168688681 + 9374112400 = 78541^2 + 96820^2 .

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 15542801081 - 2⁶ = 15542801017 is a prime.

It is a super-2 number, since 2×15542801081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15542801051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692471 + ... + 714563.

It is an arithmetic number, because the mean of its divisors is an integer number (1955749833).

Almost surely, 2^15542801081 is an apocalyptic number.

It is an amenable number.

15542801081 is a deficient number, since it is larger than the sum of its proper divisors (103197583).

15542801081 is a wasteful number, since it uses less digits than its factorization.

15542801081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26731.

The product of its (nonzero) digits is 12800, while the sum is 35.

The spelling of 15542801081 in words is "fifteen billion, five hundred forty-two million, eight hundred one thousand, eighty-one".