25140345546 has 64 divisors (see below), whose sum is σ = 53366400000. Its totient is φ = 7878854016.

The previous prime is 25140345541. The next prime is 25140345599. The reversal of 25140345546 is 64554304152.

It is not an unprimeable number, because it can be changed into a prime (25140345541) 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, 4611030 + ... + 4616478.

It is an arithmetic number, because the mean of its divisors is an integer number (833850000).

Almost surely, 2^25140345546 is an apocalyptic number.

25140345546 is an abundant number, since it is smaller than the sum of its proper divisors (28226054454).

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

25140345546 is a wasteful number, since it uses less digits than its factorization.

25140345546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6043.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 25140345546 its reverse (64554304152), we get a palindrome (89694649698).

The spelling of 25140345546 in words is "twenty-five billion, one hundred forty million, three hundred forty-five thousand, five hundred forty-six".