55121315524660 has 384 divisors, whose sum is σ = 155744644285440. Its totient is φ = 15859384320000.

The previous prime is 55121315524631. The next prime is 55121315524771. The reversal of 55121315524660 is 6642551312155.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55121315524660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5551542576 + ... + 5551552504.

It is an arithmetic number, because the mean of its divisors is an integer number (405585011160).

Almost surely, 2^{55121315524660} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55121315524660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77872322142720).

55121315524660 is an abundant number, since it is smaller than the sum of its proper divisors (100623328760780).

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

55121315524660 is a wasteful number, since it uses less digits than its factorization.

55121315524660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14027 (or 14025 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 46.

It can be divided in two parts, 55121315 and 524660, that added together give a triangular number (55645975 = T₁₀₅₄₉).

The spelling of 55121315524660 in words is "fifty-five trillion, one hundred twenty-one billion, three hundred fifteen million, five hundred twenty-four thousand, six hundred sixty".