25155220003320 has 256 divisors, whose sum is σ = 83554863897600. Its totient is φ = 6007423242240.

The previous prime is 25155220003301. The next prime is 25155220003367. The reversal of 25155220003320 is 2330002255152.

It is a super-2 number, since 2×25155220003320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79724989 + ... + 80039891.

It is an arithmetic number, because the mean of its divisors is an integer number (326386187100).

Almost surely, 2^{25155220003320} is an apocalyptic number.

25155220003320 is a gapful number since it is divisible by the number (20) 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 25155220003320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41777431948800).

25155220003320 is an abundant number, since it is smaller than the sum of its proper divisors (58399643894280).

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

25155220003320 is a wasteful number, since it uses less digits than its factorization.

25155220003320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315830 (or 315826 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 25155220003320 its reverse (2330002255152), we get a palindrome (27485222258472).

The spelling of 25155220003320 in words is "twenty-five trillion, one hundred fifty-five billion, two hundred twenty million, three thousand, three hundred twenty".