521353353541245 has 16 divisors (see below), whose sum is σ = 834380301436992. Its totient is φ = 277983476631680.

The previous prime is 521353353541231. The next prime is 521353353541249. The reversal of 521353353541245 is 542145353353125.

It is a happy number.

It is not a de Polignac number, because 521353353541245 - 2⁵ = 521353353541213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521353353541249) 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, 4477768407 + ... + 4477884836.

It is an arithmetic number, because the mean of its divisors is an integer number (52148768839812).

Almost surely, 2^{521353353541245} is an apocalyptic number.

It is an amenable number.

521353353541245 is a deficient number, since it is larger than the sum of its proper divisors (313026947895747).

521353353541245 is a wasteful number, since it uses less digits than its factorization.

521353353541245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8955657132.

The product of its digits is 16200000, while the sum is 51.

The spelling of 521353353541245 in words is "five hundred twenty-one trillion, three hundred fifty-three billion, three hundred fifty-three million, five hundred forty-one thousand, two hundred forty-five".