1025686478720 has 64 divisors (see below), whose sum is σ = 2581086070800. Its totient is φ = 388681187328.

The previous prime is 1025686478717. The next prime is 1025686478731. The reversal of 1025686478720 is 278746865201.

It is a tau number, because it is divible by the number of its divisors (64).

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, 42162449 + ... + 42186768.

Almost surely, 2^{1025686478720} is an apocalyptic number.

1025686478720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025686478720 is an abundant number, since it is smaller than the sum of its proper divisors (1555399592080).

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

1025686478720 is an equidigital number, since it uses as much as digits as its factorization.

1025686478720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84349255 (or 84349243 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 1025686478720 in words is "one trillion, twenty-five billion, six hundred eighty-six million, four hundred seventy-eight thousand, seven hundred twenty".