25545151520 has 192 divisors, whose sum is σ = 69874721280. Its totient is φ = 8644534272.

The previous prime is 25545151519. The next prime is 25545151529. The reversal of 25545151520 is 2515154552.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (25545151529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35137397 + ... + 35138123.

It is an arithmetic number, because the mean of its divisors is an integer number (363930840).

Almost surely, 2^25545151520 is an apocalyptic number.

25545151520 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 25545151520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34937360640).

25545151520 is an abundant number, since it is smaller than the sum of its proper divisors (44329569760).

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

25545151520 is a wasteful number, since it uses less digits than its factorization.

25545151520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

It can be divided in two parts, 25 and 545151520, that added together give a palindrome (545151545).

The spelling of 25545151520 in words is "twenty-five billion, five hundred forty-five million, one hundred fifty-one thousand, five hundred twenty".