15545121146 has 8 divisors (see below), whose sum is σ = 23318494164. Its totient is φ = 7772289760.

The previous prime is 15545121143. The next prime is 15545121247. The reversal of 15545121146 is 64112154551.

It can be written as a sum of positive squares in 2 ways, for example, as 14980536025 + 564585121 = 122395^2 + 23761^2 .

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

It is not an unprimeable number, because it can be changed into a prime (15545121143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53825 + ... + 184356.

Almost surely, 2^15545121146 is an apocalyptic number.

15545121146 is a deficient number, since it is larger than the sum of its proper divisors (7773373018).

15545121146 is a wasteful number, since it uses less digits than its factorization.

15545121146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270816.

The product of its digits is 24000, while the sum is 35.

Adding to 15545121146 its reverse (64112154551), we get a palindrome (79657275697).

The spelling of 15545121146 in words is "fifteen billion, five hundred forty-five million, one hundred twenty-one thousand, one hundred forty-six".