521860061234040 has 128 divisors (see below), whose sum is σ = 1606979031840000. Its totient is φ = 135496389473280.

The previous prime is 521860061234021. The next prime is 521860061234051. The reversal of 521860061234040 is 40432160068125.

It is a super-2 number, since 2×521860061234040² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521860061233983 and 521860061234001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103826602 + ... + 108736761.

It is an arithmetic number, because the mean of its divisors is an integer number (12554523686250).

Almost surely, 2^{521860061234040} is an apocalyptic number.

It is an amenable number.

521860061234040 is an abundant number, since it is smaller than the sum of its proper divisors (1085118970605960).

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

521860061234040 is a wasteful number, since it uses less digits than its factorization.

521860061234040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212563917 (or 212563913 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 521860061234040 in words is "five hundred twenty-one trillion, eight hundred sixty billion, sixty-one million, two hundred thirty-four thousand, forty".