25860142538 has 8 divisors (see below), whose sum is σ = 38804488320. Its totient is φ = 12925313100.

The previous prime is 25860142519. The next prime is 25860142573. The reversal of 25860142538 is 83524106852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2372288 + ... + 2383163.

It is an arithmetic number, because the mean of its divisors is an integer number (4850561040).

Almost surely, 2^25860142538 is an apocalyptic number.

25860142538 is a deficient number, since it is larger than the sum of its proper divisors (12944345782).

25860142538 is a wasteful number, since it uses less digits than its factorization.

25860142538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4758172.

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 25860142538 in words is "twenty-five billion, eight hundred sixty million, one hundred forty-two thousand, five hundred thirty-eight".