245173563157 has 4 divisors (see below), whose sum is σ = 246039901120. Its totient is φ = 244307225196.

The previous prime is 245173563143. The next prime is 245173563163. The reversal of 245173563157 is 751365371542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751365371542 = 2 ⋅375682685771.

It is a cyclic number.

It is not a de Polignac number, because 245173563157 - 2²³ = 245165174549 is a prime.

It is a super-2 number, since 2×245173563157² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245173563157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245173513157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433168557 + ... + 433169122.

It is an arithmetic number, because the mean of its divisors is an integer number (61509975280).

Almost surely, 2^245173563157 is an apocalyptic number.

It is an amenable number.

245173563157 is a deficient number, since it is larger than the sum of its proper divisors (866337963).

245173563157 is an equidigital number, since it uses as much as digits as its factorization.

245173563157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866337962.

The product of its digits is 2646000, while the sum is 49.

The spelling of 245173563157 in words is "two hundred forty-five billion, one hundred seventy-three million, five hundred sixty-three thousand, one hundred fifty-seven".