25040900578 has 4 divisors (see below), whose sum is σ = 37561350870. Its totient is φ = 12520450288.

The previous prime is 25040900519. The next prime is 25040900639. The reversal of 25040900578 is 87500904052.

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., 18258225129 + 6782675449 = 135123^2 + 82357^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 25040900578.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260225143 + ... + 6260225146.

Almost surely, 2^25040900578 is an apocalyptic number.

25040900578 is a deficient number, since it is larger than the sum of its proper divisors (12520450292).

25040900578 is a wasteful number, since it uses less digits than its factorization.

25040900578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12520450291.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 25040900578 in words is "twenty-five billion, forty million, nine hundred thousand, five hundred seventy-eight".