13155862720 has 448 divisors, whose sum is σ = 42759392256. Its totient is φ = 3722526720.

The previous prime is 13155862697. The next prime is 13155862721. The reversal of 13155862720 is 2726855131.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (13155862721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21461134 + ... + 21461746.

It is an arithmetic number, because the mean of its divisors is an integer number (95445072).

Almost surely, 2^13155862720 is an apocalyptic number.

13155862720 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 13155862720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21379696128).

13155862720 is an abundant number, since it is smaller than the sum of its proper divisors (29603529536).

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

13155862720 is a wasteful number, since it uses less digits than its factorization.

13155862720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 13155862720 in words is "thirteen billion, one hundred fifty-five million, eight hundred sixty-two thousand, seven hundred twenty".