225748861581787 has 2 divisors, whose sum is σ = 225748861581788. Its totient is φ = 225748861581786.

The previous prime is 225748861581781. The next prime is 225748861581821. The reversal of 225748861581787 is 787185168847522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225748861581787 - 2³⁵ = 225714501843419 is a prime.

It is a super-2 number, since 2×225748861581787² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225748861581781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112874430790893 + 112874430790894.

It is an arithmetic number, because the mean of its divisors is an integer number (112874430790894).

Almost surely, 2^{225748861581787} is an apocalyptic number.

225748861581787 is a deficient number, since it is larger than the sum of its proper divisors (1).

225748861581787 is an equidigital number, since it uses as much as digits as its factorization.

225748861581787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3371827200, while the sum is 79.

The spelling of 225748861581787 in words is "two hundred twenty-five trillion, seven hundred forty-eight billion, eight hundred sixty-one million, five hundred eighty-one thousand, seven hundred eighty-seven".