25698946990 has 32 divisors (see below), whose sum is σ = 48860798976. Its totient is φ = 9716626080.

The previous prime is 25698946969. The next prime is 25698947003. The reversal of 25698946990 is 9964989652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950622 + ... + 977281.

It is an arithmetic number, because the mean of its divisors is an integer number (1526899968).

Almost surely, 2^25698946990 is an apocalyptic number.

25698946990 is a deficient number, since it is larger than the sum of its proper divisors (23161851986).

25698946990 is a wasteful number, since it uses less digits than its factorization.

25698946990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927984.

The product of its (nonzero) digits is 75582720, while the sum is 67.

The spelling of 25698946990 in words is "twenty-five billion, six hundred ninety-eight million, nine hundred forty-six thousand, nine hundred ninety".