245721591827 has 2 divisors, whose sum is σ = 245721591828. Its totient is φ = 245721591826.

The previous prime is 245721591761. The next prime is 245721591847. The reversal of 245721591827 is 728195127542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245721591827 - 2²⁶ = 245654482963 is a prime.

It is not a weakly prime, because it can be changed into another prime (245721591847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122860795913 + 122860795914.

It is an arithmetic number, because the mean of its divisors is an integer number (122860795914).

Almost surely, 2^245721591827 is an apocalyptic number.

245721591827 is a deficient number, since it is larger than the sum of its proper divisors (1).

245721591827 is an equidigital number, since it uses as much as digits as its factorization.

245721591827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 53.

The spelling of 245721591827 in words is "two hundred forty-five billion, seven hundred twenty-one million, five hundred ninety-one thousand, eight hundred twenty-seven".