25490836542 has 8 divisors (see below), whose sum is σ = 50981673096. Its totient is φ = 8496945512.

The previous prime is 25490836523. The next prime is 25490836559. The reversal of 25490836542 is 24563809452.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

25490836542 is an admirable number.

It is a super-2 number, since 2×25490836542² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25490836491 and 25490836500.

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 3 ways as a sum of consecutive naturals, for example, 2124236373 + ... + 2124236384.

It is an arithmetic number, because the mean of its divisors is an integer number (6372709137).

Almost surely, 2^25490836542 is an apocalyptic number.

25490836542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25490836542 is a wasteful number, since it uses less digits than its factorization.

25490836542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248472762.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 25490836542 in words is "twenty-five billion, four hundred ninety million, eight hundred thirty-six thousand, five hundred forty-two".