25435415438 has 4 divisors (see below), whose sum is σ = 38153123160. Its totient is φ = 12717707718.

The previous prime is 25435415437. The next prime is 25435415471. The reversal of 25435415438 is 83451453452.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25435415431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6358853858 + ... + 6358853861.

It is an arithmetic number, because the mean of its divisors is an integer number (9538280790).

Almost surely, 2^25435415438 is an apocalyptic number.

25435415438 is a deficient number, since it is larger than the sum of its proper divisors (12717707722).

25435415438 is a wasteful number, since it uses less digits than its factorization.

25435415438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12717707721.

The product of its digits is 1152000, while the sum is 44.

The spelling of 25435415438 in words is "twenty-five billion, four hundred thirty-five million, four hundred fifteen thousand, four hundred thirty-eight".