25219502540 has 48 divisors (see below), whose sum is σ = 54709100544. Its totient is φ = 9755294400.

The previous prime is 25219502479. The next prime is 25219502573. The reversal of 25219502540 is 4520591252.

It is a self number, because there is not a number n which added to its sum of digits gives 25219502540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 883085 + ... + 911195.

It is an arithmetic number, because the mean of its divisors is an integer number (1139772928).

Almost surely, 2^25219502540 is an apocalyptic number.

25219502540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25219502540 is an abundant number, since it is smaller than the sum of its proper divisors (29489598004).

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

25219502540 is a wasteful number, since it uses less digits than its factorization.

25219502540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29598 (or 29596 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 25219502540 in words is "twenty-five billion, two hundred nineteen million, five hundred two thousand, five hundred forty".