25403154352240 has 160 divisors (see below), whose sum is σ = 68004471435264. Its totient is φ = 8644689730560.

The previous prime is 25403154352201. The next prime is 25403154352267. The reversal of 25403154352240 is 4225345130452.

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

It is a junction number, because it is equal to n+sod(n) for n = 25403154352193 and 25403154352202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63112425 + ... + 63513655.

Almost surely, 2^{25403154352240} is an apocalyptic number.

25403154352240 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 25403154352240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34002235717632).

25403154352240 is an abundant number, since it is smaller than the sum of its proper divisors (42601317083024).

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

25403154352240 is a wasteful number, since it uses less digits than its factorization.

25403154352240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402095 (or 402089 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 25403154352240 its reverse (4225345130452), we get a palindrome (29628499482692).

The spelling of 25403154352240 in words is "twenty-five trillion, four hundred three billion, one hundred fifty-four million, three hundred fifty-two thousand, two hundred forty".