25945499209442 has 16 divisors (see below), whose sum is σ = 38924781984000. Its totient is φ = 12970572054240.

The previous prime is 25945499209429. The next prime is 25945499209447. The reversal of 25945499209442 is 24490299454952.

It is not an unprimeable number, because it can be changed into a prime (25945499209447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632195159 + ... + 632236197.

It is an arithmetic number, because the mean of its divisors is an integer number (2432798874000).

Almost surely, 2^{25945499209442} is an apocalyptic number.

25945499209442 is a deficient number, since it is larger than the sum of its proper divisors (12979282774558).

25945499209442 is a wasteful number, since it uses less digits than its factorization.

25945499209442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86401.

The product of its (nonzero) digits is 335923200, while the sum is 68.

The spelling of 25945499209442 in words is "twenty-five trillion, nine hundred forty-five billion, four hundred ninety-nine million, two hundred nine thousand, four hundred forty-two".