245664643534 has 32 divisors (see below), whose sum is σ = 394513519680. Its totient is φ = 114446745600.

The previous prime is 245664643529. The next prime is 245664643537. The reversal of 245664643534 is 435346466542.

245664643534 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×245664643534² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245664643537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107322 + ... + 1310530.

It is an arithmetic number, because the mean of its divisors is an integer number (12328547490).

Almost surely, 2^245664643534 is an apocalyptic number.

245664643534 is a deficient number, since it is larger than the sum of its proper divisors (148848876146).

245664643534 is a wasteful number, since it uses less digits than its factorization.

245664643534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203916.

The product of its digits is 24883200, while the sum is 52.

The spelling of 245664643534 in words is "two hundred forty-five billion, six hundred sixty-four million, six hundred forty-three thousand, five hundred thirty-four".