65645556125 has 64 divisors (see below), whose sum is σ = 85185644544. Its totient is φ = 50471680000.

The previous prime is 65645556107. The next prime is 65645556131. The reversal of 65645556125 is 52165554656.

It is not a de Polignac number, because 65645556125 - 2¹⁴ = 65645539741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 152309660 + ... + 152310090.

It is an arithmetic number, because the mean of its divisors is an integer number (1331025696).

Almost surely, 2^65645556125 is an apocalyptic number.

It is an amenable number.

65645556125 is a deficient number, since it is larger than the sum of its proper divisors (19540088419).

65645556125 is a wasteful number, since it uses less digits than its factorization.

65645556125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 853 counting only the distinct ones).

The product of its digits is 5400000, while the sum is 50.

The spelling of 65645556125 in words is "sixty-five billion, six hundred forty-five million, five hundred fifty-six thousand, one hundred twenty-five".