25651121504646 has 64 divisors (see below), whose sum is σ = 56523740391936. Its totient is φ = 7695624384000.

The previous prime is 25651121504639. The next prime is 25651121504647. The reversal of 25651121504646 is 64640512115652.

It is a happy number.

It is a super-2 number, since 2×25651121504646² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25651121504595 and 25651121504604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25651121504647) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 114590046 + ... + 114813678.

It is an arithmetic number, because the mean of its divisors is an integer number (883183443624).

Almost surely, 2^{25651121504646} is an apocalyptic number.

25651121504646 is an abundant number, since it is smaller than the sum of its proper divisors (30872618887290).

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

25651121504646 is a wasteful number, since it uses less digits than its factorization.

25651121504646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240957.

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 25651121504646 in words is "twenty-five trillion, six hundred fifty-one billion, one hundred twenty-one million, five hundred four thousand, six hundred forty-six".