25729146816 has 56 divisors (see below), whose sum is σ = 68468619984. Its totient is φ = 8526796800.

The previous prime is 25729146809. The next prime is 25729146827. The reversal of 25729146816 is 61864192752.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354085 + ... + 420516.

Almost surely, 2^25729146816 is an apocalyptic number.

It is an amenable number.

25729146816 is an abundant number, since it is smaller than the sum of its proper divisors (42739473168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25729146816 is a wasteful number, since it uses less digits than its factorization.

25729146816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774789 (or 774779 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The spelling of 25729146816 in words is "twenty-five billion, seven hundred twenty-nine million, one hundred forty-six thousand, eight hundred sixteen".