245121964771 has 2 divisors, whose sum is σ = 245121964772. Its totient is φ = 245121964770.

The previous prime is 245121964757. The next prime is 245121964777. The reversal of 245121964771 is 177469121542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245121964771 - 2⁵ = 245121964739 is a prime.

It is a super-2 number, since 2×245121964771² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (245121964777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122560982385 + 122560982386.

It is an arithmetic number, because the mean of its divisors is an integer number (122560982386).

Almost surely, 2^245121964771 is an apocalyptic number.

245121964771 is a deficient number, since it is larger than the sum of its proper divisors (1).

245121964771 is an equidigital number, since it uses as much as digits as its factorization.

245121964771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 49.

The spelling of 245121964771 in words is "two hundred forty-five billion, one hundred twenty-one million, nine hundred sixty-four thousand, seven hundred seventy-one".