25841556969978 has 32 divisors (see below), whose sum is σ = 51703111512000. Its totient is φ = 8610519724416.

The previous prime is 25841556969937. The next prime is 25841556969979. The reversal of 25841556969978 is 87996965514852.

It is a self number, because there is not a number n which added to its sum of digits gives 25841556969978.

It is not an unprimeable number, because it can be changed into a prime (25841556969979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497185200 + ... + 497237172.

It is an arithmetic number, because the mean of its divisors is an integer number (1615722234750).

Almost surely, 2^{25841556969978} is an apocalyptic number.

25841556969978 is an abundant number, since it is smaller than the sum of its proper divisors (25861554542022).

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

25841556969978 is a wasteful number, since it uses less digits than its factorization.

25841556969978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82446.

The product of its digits is 11757312000, while the sum is 84.

The spelling of 25841556969978 in words is "twenty-five trillion, eight hundred forty-one billion, five hundred fifty-six million, nine hundred sixty-nine thousand, nine hundred seventy-eight".