25436273478 has 48 divisors (see below), whose sum is σ = 64558119744. Its totient is φ = 6606823440.

The previous prime is 25436273453. The next prime is 25436273509. The reversal of 25436273478 is 87437263452.

It is a self number, because there is not a number n which added to its sum of digits gives 25436273478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3929400 + ... + 3935867.

It is an arithmetic number, because the mean of its divisors is an integer number (1344960828).

Almost surely, 2^25436273478 is an apocalyptic number.

25436273478 is an abundant number, since it is smaller than the sum of its proper divisors (39121846266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25436273478 is a wasteful number, since it uses less digits than its factorization.

25436273478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7865297 (or 7865290 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 51.

The spelling of 25436273478 in words is "twenty-five billion, four hundred thirty-six million, two hundred seventy-three thousand, four hundred seventy-eight".