1025216263565 has 32 divisors (see below), whose sum is σ = 1401437479680. Its totient is φ = 714245976576.

The previous prime is 1025216263481. The next prime is 1025216263583. The reversal of 1025216263565 is 5653626125201.

It is a cyclic number.

It is not a de Polignac number, because 1025216263565 - 2²⁴ = 1025199486349 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4587875 + ... + 4806144.

It is an arithmetic number, because the mean of its divisors is an integer number (43794921240).

Almost surely, 2^{1025216263565} is an apocalyptic number.

It is an amenable number.

1025216263565 is a deficient number, since it is larger than the sum of its proper divisors (376221216115).

1025216263565 is a wasteful number, since it uses less digits than its factorization.

1025216263565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9394133.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 1025216263565 in words is "one trillion, twenty-five billion, two hundred sixteen million, two hundred sixty-three thousand, five hundred sixty-five".