1025521646544 has 60 divisors (see below), whose sum is σ = 2912872664416. Its totient is φ = 336738447936.

The previous prime is 1025521646543. The next prime is 1025521646599. The reversal of 1025521646544 is 4456461255201.

1025521646544 is a `hidden beast` number, since 1 + 0 + 2 + 5 + 52 + 16 + 46 + 544 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1025521646544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025521646543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53137204 + ... + 53156499.

Almost surely, 2^{1025521646544} is an apocalyptic number.

It is an amenable number.

1025521646544 is an abundant number, since it is smaller than the sum of its proper divisors (1887351017872).

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

1025521646544 is a wasteful number, since it uses less digits than its factorization.

1025521646544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106293784 (or 106293775 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 1025521646544 in words is "one trillion, twenty-five billion, five hundred twenty-one million, six hundred forty-six thousand, five hundred forty-four".