25195750042 has 4 divisors (see below), whose sum is σ = 37793625066. Its totient is φ = 12597875020.

The previous prime is 25195750037. The next prime is 25195750051. The reversal of 25195750042 is 24005759152.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 22991353641 + 2204396401 = 151629^2 + 46951^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25195749977 and 25195750004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6298937509 + ... + 6298937512.

Almost surely, 2^25195750042 is an apocalyptic number.

25195750042 is a deficient number, since it is larger than the sum of its proper divisors (12597875024).

25195750042 is a wasteful number, since it uses less digits than its factorization.

25195750042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12597875023.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 25195750042 in words is "twenty-five billion, one hundred ninety-five million, seven hundred fifty thousand, forty-two".