25463781951 has 24 divisors (see below), whose sum is σ = 36019920384. Its totient is φ = 15984159840.

The previous prime is 25463781947. The next prime is 25463781961. The reversal of 25463781951 is 15918736452.

It is not a de Polignac number, because 25463781951 - 2² = 25463781947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25463781894 and 25463781903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25463781911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27316 + ... + 227318.

It is an arithmetic number, because the mean of its divisors is an integer number (1500830016).

Almost surely, 2^25463781951 is an apocalyptic number.

25463781951 is a deficient number, since it is larger than the sum of its proper divisors (10556138433).

25463781951 is a wasteful number, since it uses less digits than its factorization.

25463781951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200111 (or 200074 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 51.

The spelling of 25463781951 in words is "twenty-five billion, four hundred sixty-three million, seven hundred eighty-one thousand, nine hundred fifty-one".