25215464741 has 4 divisors (see below), whose sum is σ = 25216445184. Its totient is φ = 25214484300.

The previous prime is 25215464731. The next prime is 25215464749. The reversal of 25215464741 is 14746451252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25215464741 - 2¹⁰ = 25215463717 is a prime.

It is a super-2 number, since 2×25215464741² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25215464749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450575 + ... + 503436.

It is an arithmetic number, because the mean of its divisors is an integer number (6304111296).

Almost surely, 2^25215464741 is an apocalyptic number.

It is an amenable number.

25215464741 is a deficient number, since it is larger than the sum of its proper divisors (980443).

25215464741 is an equidigital number, since it uses as much as digits as its factorization.

25215464741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980442.

The product of its digits is 268800, while the sum is 41.

The spelling of 25215464741 in words is "twenty-five billion, two hundred fifteen million, four hundred sixty-four thousand, seven hundred forty-one".