25577530078 has 4 divisors (see below), whose sum is σ = 38366295120. Its totient is φ = 12788765038.

The previous prime is 25577530073. The next prime is 25577530087. The reversal of 25577530078 is 87003577552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25577530073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394382518 + ... + 6394382521.

It is an arithmetic number, because the mean of its divisors is an integer number (9591573780).

Almost surely, 2^25577530078 is an apocalyptic number.

25577530078 is a deficient number, since it is larger than the sum of its proper divisors (12788765042).

25577530078 is a wasteful number, since it uses less digits than its factorization.

25577530078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12788765041.

The product of its (nonzero) digits is 2058000, while the sum is 49.

The spelling of 25577530078 in words is "twenty-five billion, five hundred seventy-seven million, five hundred thirty thousand, seventy-eight".