245315555520 has 112 divisors (see below), whose sum is σ = 890145040128. Its totient is φ = 56072125440.

The previous prime is 245315555479. The next prime is 245315555521. The reversal of 245315555520 is 25555513542.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (245315555521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18245926 + ... + 18259365.

Almost surely, 2^245315555520 is an apocalyptic number.

245315555520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245315555520 is an abundant number, since it is smaller than the sum of its proper divisors (644829484608).

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

245315555520 is a wasteful number, since it uses less digits than its factorization.

245315555520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36505318 (or 36505308 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 42.

The spelling of 245315555520 in words is "two hundred forty-five billion, three hundred fifteen million, five hundred fifty-five thousand, five hundred twenty".