25480396815 has 16 divisors (see below), whose sum is σ = 40810818048. Its totient is φ = 13575483936.

The previous prime is 25480396811. The next prime is 25480396819. The reversal of 25480396815 is 51869308452.

It is an interprime number because it is at equal distance from previous prime (25480396811) and next prime (25480396819).

It is not a de Polignac number, because 25480396815 - 2² = 25480396811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25480396811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 863827 + ... + 892836.

It is an arithmetic number, because the mean of its divisors is an integer number (2550676128).

Almost surely, 2^25480396815 is an apocalyptic number.

25480396815 is a deficient number, since it is larger than the sum of its proper divisors (15330421233).

25480396815 is a wasteful number, since it uses less digits than its factorization.

25480396815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757638.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 25480396815 in words is "twenty-five billion, four hundred eighty million, three hundred ninety-six thousand, eight hundred fifteen".