25143909394 has 16 divisors (see below), whose sum is σ = 37791360000. Its totient is φ = 12546808384.

The previous prime is 25143909391. The next prime is 25143909421. The reversal of 25143909394 is 49390934152.

It is a super-2 number, since 2×25143909394² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25143909391) 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 in 7 ways as a sum of consecutive naturals, for example, 5237007 + ... + 5241805.

It is an arithmetic number, because the mean of its divisors is an integer number (2361960000).

Almost surely, 2^25143909394 is an apocalyptic number.

25143909394 is a deficient number, since it is larger than the sum of its proper divisors (12647450606).

25143909394 is a wasteful number, since it uses less digits than its factorization.

25143909394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9497.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 25143909394 in words is "twenty-five billion, one hundred forty-three million, nine hundred nine thousand, three hundred ninety-four".