25430134542 has 16 divisors (see below), whose sum is σ = 50879145600. Its totient is φ = 8473565432.

The previous prime is 25430134517. The next prime is 25430134547. The reversal of 25430134542 is 24543103452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25430134547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768978 + ... + 801365.

It is an arithmetic number, because the mean of its divisors is an integer number (3179946600).

Almost surely, 2^25430134542 is an apocalyptic number.

25430134542 is an abundant number, since it is smaller than the sum of its proper divisors (25449011058).

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

25430134542 is a wasteful number, since it uses less digits than its factorization.

25430134542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573047.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 25430134542 its reverse (24543103452), we get a palindrome (49973237994).

The spelling of 25430134542 in words is "twenty-five billion, four hundred thirty million, one hundred thirty-four thousand, five hundred forty-two".