25278378435 has 12 divisors (see below), whose sum is σ = 43815856032. Its totient is φ = 13481801808.

The previous prime is 25278378431. The next prime is 25278378439. The reversal of 25278378435 is 53487387252.

25278378435 is a `hidden beast` number, since 2 + 527 + 8 + 3 + 7 + 84 + 35 = 666.

It is an interprime number because it is at equal distance from previous prime (25278378431) and next prime (25278378439).

It is not a de Polignac number, because 25278378435 - 2² = 25278378431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25278378431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280870827 + ... + 280870916.

It is an arithmetic number, because the mean of its divisors is an integer number (3651321336).

Almost surely, 2^25278378435 is an apocalyptic number.

25278378435 is a deficient number, since it is larger than the sum of its proper divisors (18537477597).

25278378435 is a wasteful number, since it uses less digits than its factorization.

25278378435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561741754 (or 561741751 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 54.

The spelling of 25278378435 in words is "twenty-five billion, two hundred seventy-eight million, three hundred seventy-eight thousand, four hundred thirty-five".