15000121641 has 16 divisors (see below), whose sum is σ = 20548728000. Its totient is φ = 9726009408.

The previous prime is 15000121601. The next prime is 15000121651. The reversal of 15000121641 is 14612100051.

It is not a de Polignac number, because 15000121641 - 2¹¹ = 15000119593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15000121601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274555 + ... + 324623.

It is an arithmetic number, because the mean of its divisors is an integer number (1284295500).

Almost surely, 2^15000121641 is an apocalyptic number.

It is an amenable number.

15000121641 is a deficient number, since it is larger than the sum of its proper divisors (5548606359).

15000121641 is a wasteful number, since it uses less digits than its factorization.

15000121641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52808.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 15000121641 its reverse (14612100051), we get a palindrome (29612221692).

The spelling of 15000121641 in words is "fifteen billion, one hundred twenty-one thousand, six hundred forty-one".