245545140541521 has 16 divisors (see below), whose sum is σ = 328615556256000. Its totient is φ = 163085760962688.

The previous prime is 245545140541499. The next prime is 245545140541529. The reversal of 245545140541521 is 125145041545542.

It is not a de Polignac number, because 245545140541521 - 2⁶ = 245545140541457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245545140541529) 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, 52006005 + ... + 56530653.

It is an arithmetic number, because the mean of its divisors is an integer number (20538472266000).

Almost surely, 2^{245545140541521} is an apocalyptic number.

It is an amenable number.

245545140541521 is a deficient number, since it is larger than the sum of its proper divisors (83070415714479).

245545140541521 is a wasteful number, since it uses less digits than its factorization.

245545140541521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592168.

The product of its (nonzero) digits is 3200000, while the sum is 48.

The spelling of 245545140541521 in words is "two hundred forty-five trillion, five hundred forty-five billion, one hundred forty million, five hundred forty-one thousand, five hundred twenty-one".