521860061540061 has 24 divisors (see below), whose sum is σ = 762850207622880. Its totient is φ = 343745862306336.

The previous prime is 521860061539951. The next prime is 521860061540141. The reversal of 521860061540061 is 160045160068125.

521860061540061 is a `hidden beast` number, since 5 + 2 + 186 + 0 + 0 + 6 + 1 + 5 + 400 + 61 = 666.

It is not a de Polignac number, because 521860061540061 - 2⁷ = 521860061539933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521860061539989 and 521860061540016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521860061540561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 714556870 + ... + 715286823.

It is an arithmetic number, because the mean of its divisors is an integer number (31785425317620).

Almost surely, 2^{521860061540061} is an apocalyptic number.

It is an amenable number.

521860061540061 is a deficient number, since it is larger than the sum of its proper divisors (240990146082819).

521860061540061 is a wasteful number, since it uses less digits than its factorization.

521860061540061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429844185 (or 1429844182 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 521860061540061 in words is "five hundred twenty-one trillion, eight hundred sixty billion, sixty-one million, five hundred forty thousand, sixty-one".