25473453507661 has 8 divisors (see below), whose sum is σ = 26075106018720. Its totient is φ = 24872221297392.

The previous prime is 25473453507617. The next prime is 25473453507679. The reversal of 25473453507661 is 16670535437452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25473453507661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25473453507596 and 25473453507605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25473453504661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104952550 + ... + 105194983.

It is an arithmetic number, because the mean of its divisors is an integer number (3259388252340).

Almost surely, 2^{25473453507661} is an apocalyptic number.

It is an amenable number.

25473453507661 is a deficient number, since it is larger than the sum of its proper divisors (601652511059).

25473453507661 is a wasteful number, since it uses less digits than its factorization.

25473453507661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210150395.

The product of its (nonzero) digits is 63504000, while the sum is 58.

The spelling of 25473453507661 in words is "twenty-five trillion, four hundred seventy-three billion, four hundred fifty-three million, five hundred seven thousand, six hundred sixty-one".