25216987475782 has 4 divisors (see below), whose sum is σ = 37825481213676. Its totient is φ = 12608493737890.

The previous prime is 25216987475761. The next prime is 25216987475857. The reversal of 25216987475782 is 28757478961252.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6304246868944 + ... + 6304246868947.

It is an arithmetic number, because the mean of its divisors is an integer number (9456370303419).

Almost surely, 2^{25216987475782} is an apocalyptic number.

25216987475782 is a deficient number, since it is larger than the sum of its proper divisors (12608493737894).

25216987475782 is a wasteful number, since it uses less digits than its factorization.

25216987475782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12608493737893.

The product of its digits is 948326400, while the sum is 73.

The spelling of 25216987475782 in words is "twenty-five trillion, two hundred sixteen billion, nine hundred eighty-seven million, four hundred seventy-five thousand, seven hundred eighty-two".