655691946025 has 6 divisors (see below), whose sum is σ = 813058013102. Its totient is φ = 524553556800.

The previous prime is 655691946023. The next prime is 655691946079. The reversal of 655691946025 is 520649196556.

It can be written as a sum of positive squares in 3 ways, for example, as 10672542864 + 645019403161 = 103308^2 + 803131^2 .

It is not a de Polignac number, because 655691946025 - 2¹ = 655691946023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655691946023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13113838896 + ... + 13113838945.

Almost surely, 2^655691946025 is an apocalyptic number.

It is an amenable number.

655691946025 is a deficient number, since it is larger than the sum of its proper divisors (157366067077).

655691946025 is a wasteful number, since it uses less digits than its factorization.

655691946025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26227677851 (or 26227677846 counting only the distinct ones).

The product of its (nonzero) digits is 17496000, while the sum is 58.

The spelling of 655691946025 in words is "six hundred fifty-five billion, six hundred ninety-one million, nine hundred forty-six thousand, twenty-five".