245173563156 has 24 divisors (see below), whose sum is σ = 572264282464. Its totient is φ = 81697001760.

The previous prime is 245173563143. The next prime is 245173563163. The reversal of 245173563156 is 651365371542.

It is a happy number.

It is a super-2 number, since 2×245173563156² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3402775 + ... + 3474078.

Almost surely, 2^245173563156 is an apocalyptic number.

It is an amenable number.

245173563156 is an abundant number, since it is smaller than the sum of its proper divisors (327090719308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245173563156 is a wasteful number, since it uses less digits than its factorization.

245173563156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6879831 (or 6879829 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 48.

The spelling of 245173563156 in words is "two hundred forty-five billion, one hundred seventy-three million, five hundred sixty-three thousand, one hundred fifty-six".