15211014640 has 80 divisors (see below), whose sum is σ = 35837706240. Its totient is φ = 6003728640.

The previous prime is 15211014601. The next prime is 15211014641. The reversal of 15211014640 is 4641011251.

15211014640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15211014641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1852945 + ... + 1861135.

It is an arithmetic number, because the mean of its divisors is an integer number (447971328).

Almost surely, 2^15211014640 is an apocalyptic number.

15211014640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15211014640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17918853120).

15211014640 is an abundant number, since it is smaller than the sum of its proper divisors (20626691600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15211014640 is a wasteful number, since it uses less digits than its factorization.

15211014640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8510 (or 8504 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 15211014640 its reverse (4641011251), we get a palindrome (19852025891).

The spelling of 15211014640 in words is "fifteen billion, two hundred eleven million, fourteen thousand, six hundred forty".