25578278510 has 16 divisors (see below), whose sum is σ = 46069228656. Its totient is φ = 10225016448.

The previous prime is 25578278497. The next prime is 25578278513. The reversal of 25578278510 is 1587287552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25578278513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769787 + ... + 802326.

It is an arithmetic number, because the mean of its divisors is an integer number (2879326791).

Almost surely, 2^25578278510 is an apocalyptic number.

25578278510 is a deficient number, since it is larger than the sum of its proper divisors (20490950146).

25578278510 is a wasteful number, since it uses less digits than its factorization.

25578278510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573747.

The product of its (nonzero) digits is 1568000, while the sum is 50.

The spelling of 25578278510 in words is "twenty-five billion, five hundred seventy-eight million, two hundred seventy-eight thousand, five hundred ten".