511505545542442 has 24 divisors (see below), whose sum is σ = 853510896399168. Its totient is φ = 229701285502920.

The previous prime is 511505545542293. The next prime is 511505545542473. The reversal of 511505545542442 is 244245545505115.

It is a self number, because there is not a number n which added to its sum of digits gives 511505545542442.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12732867138 + ... + 12732907309.

It is an arithmetic number, because the mean of its divisors is an integer number (35562954016632).

Almost surely, 2^{511505545542442} is an apocalyptic number.

511505545542442 is a deficient number, since it is larger than the sum of its proper divisors (342005350856726).

511505545542442 is a wasteful number, since it uses less digits than its factorization.

511505545542442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25465774554 (or 25465774543 counting only the distinct ones).

The product of its (nonzero) digits is 16000000, while the sum is 52.

The spelling of 511505545542442 in words is "five hundred eleven trillion, five hundred five billion, five hundred forty-five million, five hundred forty-two thousand, four hundred forty-two".