25735216513 has 8 divisors (see below), whose sum is σ = 26015412800. Its totient is φ = 25455603888.

The previous prime is 25735216499. The next prime is 25735216609. The reversal of 25735216513 is 31561253752.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25735216513 - 2²¹ = 25733119361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25735216813) 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, 56958 + ... + 233911.

It is an arithmetic number, because the mean of its divisors is an integer number (3251926600).

Almost surely, 2^25735216513 is an apocalyptic number.

It is an amenable number.

25735216513 is a deficient number, since it is larger than the sum of its proper divisors (280196287).

25735216513 is a wasteful number, since it uses less digits than its factorization.

25735216513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291831.

The product of its digits is 189000, while the sum is 40.

The spelling of 25735216513 in words is "twenty-five billion, seven hundred thirty-five million, two hundred sixteen thousand, five hundred thirteen".