655513751 has 2 divisors, whose sum is σ = 655513752. Its totient is φ = 655513750.

The previous prime is 655513741. The next prime is 655513759. The reversal of 655513751 is 157315556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655513751 - 2⁶ = 655513687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655513759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327756875 + 327756876.

It is an arithmetic number, because the mean of its divisors is an integer number (327756876).

Almost surely, 2^655513751 is an apocalyptic number.

655513751 is a deficient number, since it is larger than the sum of its proper divisors (1).

655513751 is an equidigital number, since it uses as much as digits as its factorization.

655513751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78750, while the sum is 38.

The square root of 655513751 is about 25603.0027731124. The cubic root of 655513751 is about 868.6815591512.

The spelling of 655513751 in words is "six hundred fifty-five million, five hundred thirteen thousand, seven hundred fifty-one".