25201978530 has 16 divisors (see below), whose sum is σ = 60484748544. Its totient is φ = 6720527600.

The previous prime is 25201978507. The next prime is 25201978579. The reversal of 25201978530 is 3587910252.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 420032946 + ... + 420033005.

It is an arithmetic number, because the mean of its divisors is an integer number (3780296784).

Almost surely, 2^25201978530 is an apocalyptic number.

25201978530 is an abundant number, since it is smaller than the sum of its proper divisors (35282770014).

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

25201978530 is a wasteful number, since it uses less digits than its factorization.

25201978530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840065961.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 25201978530 in words is "twenty-five billion, two hundred one million, nine hundred seventy-eight thousand, five hundred thirty".